In the Court of Appeal of Alberta  
Citation: Reference re Impact Assessment Act, 2022 ABCA 165  
Date: 20220510  
Docket: 1901-0276AC  
Registry: Calgary  
In the Matter of An Act to enact the Impact Assessment Act and the Canadian Energy  
Regulator Act, to amend the Navigation Protection Act and to make consequential  
amendments to other Acts, SC 2019, c 28 and the Physical Activities Regulations,  
SOR/2019-285  
And in the Matter of a Reference by the Lieutenant Governor in Council to the Court of  
Appeal of Alberta under the Judicature Act, RSA 2000, c J-2, s 26  
_______________________________________________________  
The Court:  
The Honourable Chief Justice Catherine Fraser  
The Honourable Justice Jack Watson  
The Honourable Justice J.D. Bruce McDonald  
The Honourable Justice Sheila Greckol  
The Honourable Justice Jo’Anne Strekaf  
_______________________________________________________  
Opinion of the Honourable Chief Justice Fraser,  
the Honourable Justice Watson and  
the Honourable Justice McDonald  
Concurred in by the Honourable Justice Strekaf  
Dissenting Opinion of the Honourable Justice Greckol  
Reference by the Lieutenant Governor in Council  
Order in Council 160/2019  
Dated the 9th day of September, 2019  
Filed the 10th day of September, 2019  
Table of Contents  
Paragraph  
I.  
Introduction ................................................................................................................[1]  
Positions of the Parties.................................................................................................[34]  
II.  
A.  
B.  
Alberta and Intervenors in Support of Alberta ................................................[34]  
Canada and Intervenors in Support of Canada ................................................[39]  
III.  
Relevant Provisions of the Constitution ......................................................................[45]  
A.  
Constitution Act, 1867 .....................................................................................[45]  
1.  
2.  
Federal Legislative Powers..................................................................[45]  
Provincial Legislative Powers..............................................................[45]  
B.  
Key Provisions Added by the Constitution Act, 1982 .....................................[45]  
1.  
Additional Provincial Powers under Amendment to the Constitution  
Act, 1867 ..............................................................................................[45]  
Procedure for Amending the Constitution...........................................[45]  
2.  
IV.  
V.  
The Environment and the Division of Powers.............................................................[46]  
A.  
B.  
The Environment is a Constitutionally Abstruse Matter .................................[46]  
Environmental Impact Assessments Are Not Within Parliament’s Exclusive  
Jurisdiction.......................................................................................................[49]  
Joint Federal-Provincial Environmental Accords............................................[50]  
C.  
History of Prairie Provinces - Ownership of Natural Resources and Section 92A .....[52]  
A.  
B.  
Prairie Provinces Secure Ownership of Their Natural Resources ...................[53]  
Federal Government Interventions and Pressures for Constitutional  
Reform .............................................................................................................[57]  
Constitutional Compromise .............................................................................[64]  
C.  
1.  
2.  
3.  
4.  
Section 92A Resource Amendment..................................................[64]  
Section 38 Opt-Out Right .................................................................[67]  
Section 36 Economic Development and Equalization......................[69]  
Conclusion ...........................................................................................[72]  
D.  
Role of the Courts............................................................................................[73]  
VI.  
The Purpose and Scope of the Resource Amendment..................................................[74]  
A.  
B.  
C.  
D.  
Introduction......................................................................................................[74]  
Purpose of the Resource Amendment...............................................................[76]  
Scope of the Resource Amendment..................................................................[77]  
Significance of the Resource Amendment........................................................[81]  
VII. Overview of Environmental Impact Assessment Legislation Federally......................[84]  
A. Brief Historical Review of Federal Legislation...............................................[84]  
1.  
2.  
3.  
Environmental Assessment and Guidelines Order ..............................[84]  
Canadian Environmental Assessment Act, 1992 .................................[86]  
Canadian Environmental Assessment Act, 2012 .................................[93]  
Page: 1  
B.  
Overview of the Act and Regulations ............................................................[100]  
1.  
Scope and Purposes of the Act...........................................................[101]  
2.  
3.  
4.  
5.  
6.  
7.  
Relevant Definitions Under the Act Relating to Effects ....................[105]  
Exclusivity Principle Primary and Limited Jurisdiction.................[106]  
Activities Included in the IAA............................................................[109]  
Section 7 and Prohibitions .................................................................[111]  
Section 8 and Prohibitions .................................................................[114]  
Phases of Impact Assessment Process ...............................................[116]  
VIII. Overview of Environmental Assessment Legislation Provincially ...........................[123]  
A.  
Alberta............................................................................................................[123]  
1.  
Overview of Environmental Impact Assessment Legislation in  
Alberta .............................................................................................[123]  
Operational Aspects of Alberta’s Environmental Impact Assessment  
Regime .............................................................................................[127]  
In Situ Oil Sands Projects ..................................................................[131]  
Canada-Alberta Bilateral Agreement on Environmental  
2.  
3.  
4.  
Assessment.........................................................................................[135]  
B.  
C.  
Ontario ...........................................................................................................[136]  
1.  
Overview of Environmental Assessment Impact Legislation in  
Ontario .............................................................................................[136]  
Operational Aspects of Ontario’s Environmental Impact Assessment  
Regime .............................................................................................[139]  
2.  
Saskatchewan.................................................................................................[141]  
1.  
Overview of Environmental Assessment Legislation in  
Saskatchewan.....................................................................................[141]  
Operational Aspects of Saskatchewan’s Environmental Impact  
Assessment Regime ...........................................................................[142]  
2.  
IX.  
Foundational Constitutional Principles......................................................................[145]  
A.  
B.  
C.  
Federalism......................................................................................................[145]  
Subsidiarity ....................................................................................................[149]  
Conclusion .....................................................................................................[152]  
X.  
Indigenous Peoples and the Division of Federal/Provincial Powers .........................[153]  
A.  
B.  
Section 91(24) of the Constitution Act, 1867.................................................[153]  
Section 35 of the Constitution Act, 1982 .......................................................[158]  
XI.  
Division of Powers Framework .................................................................................[164]  
A.  
The Two Stages in a Division of Powers Analysis........................................[164]  
1.  
2.  
Characterization of the “Matter” of the Challenged Law ..................[167]  
Classification Under Head of Power..................................................[172]  
B.  
C.  
D.  
E.  
Importance of Keeping the Two Stages Separate..........................................[173]  
The Pith and Substance Doctrine and the Environment ................................[174]  
The POGG Power ..........................................................................................[181]  
Cooperative Federalism and Caution.............................................................[186]  
XII. The First Stage: Characterization – What is the “Matter” of the IAA?......................[190]  
A. Introduction....................................................................................................[190]  
1. The IAA Two Acts in One...............................................................[190]  
B.  
C.  
Purpose of the Legislative Scheme................................................................[192]  
1.  
Intrinsic Evidence of Purpose............................................................[192]  
a.  
b.  
c.  
Title ....................................................................................[192]  
Preamble ................................................................................[194]  
Statutory Purposes of the Act.................................................[199]  
2.  
3.  
Extrinsic Evidence of Purpose...........................................................[202]  
Conclusions Relating to Purpose of the IAA......................................[205]  
Effects of the IAA...........................................................................................[206]  
1.  
2.  
Introduction........................................................................................[206]  
Legal Effects of the IAA.....................................................................[210]  
a.  
Designation and Public Interest Determination vis à vis  
Intra-Provincial Designated Projects Are Not Linked to  
Federal Decision-Making Authority  
[210]  
[210]  
(i)  
Scope of the IAA and Designation of Designated  
Projects  
(ii)  
Need for Federal Decision-Making Authority Linked  
to Federal Head of Power [219]  
b.  
Regulation of Any and All Effects of Intra-Provincial  
Designated Projects  
[227]  
[229]  
(i)  
Self-Defined "Effects Within Federal Jurisdiction"  
Are Not All Within Federal Jurisdiction  
(ii)  
Federal Jurisdiction Does Not Extend to Any and  
All Effects of Intra-Provincial Designated Projects [232]  
(iii) Public Interest Determination Is Not Limited to  
Purported Adverse Federal Effects  
[251]  
[256]  
(iv)  
Conclusions  
c.  
Prohibitions Under Section 7 and Federal Jurisdictional  
Overreach  
[265]  
[272]  
[282]  
(i)  
Prohibitions on Changes to Particular Components  
of the Environment  
Prohibitions on Changes on Federal Lands, Outside  
the Province or Outside Canada  
(ii)  
(iii) Prohibitions on Matters Affecting Indigenous  
Peoples of Canada  
[301]  
[317]  
[318]  
[320]  
(iv)  
(v)  
Additional Prohibitions  
Term and Effect of the Prohibitions  
d.  
e.  
Exercise of Federal Regulatory Power  
Requirement for Public Interest Determination by the  
Federal Executive and Consequences if Determination  
Is Not Positive  
[321]  
[321]  
(i)  
(ii)  
Key Decision Under the IAA  
Public Interest Determination by the Federal  
Executive  
[322]  
f.  
g.  
Time Limits for Assessments and Decision Statements  
Consultation with Other Jurisdictions  
[348]  
[353]  
3.  
Practical Effects of the IAA................................................................[356]  
a.  
b.  
c.  
Delay  
Uncertainty  
[358]  
[362]  
No Practical Remedy to Review Federal Action/Inaction [366]  
D.  
Conclusion Regarding the “Matter” of the IAA.............................................[372]  
XIII. De Facto Expropriation .............................................................................................[374]  
XIV. Classification of the Subject Matter of the IAA .........................................................[378]  
A.  
B.  
Introduction....................................................................................................[378]  
Federal Heads of Power.................................................................................[380]  
1.  
2.  
Federal Triggers Do Not Determine Classification ...........................[380]  
The Subject Matter of the IAA Is Not Within Federal Heads of  
Power .............................................................................................[384]  
a.  
b.  
c.  
Section 91(12) Sea Coast and Inland Fisheries...................[385]  
Section 132 Imperial Treaties .............................................[389]  
Section 91(24) Indians and Lands Reserved for the  
Indians....................................................................................[393]  
Section 91 National Concern Doctrine Under POGG ........[397]  
Section 91(2) Trade and Commerce ...................................[399]  
Section 91(27) Criminal Law..............................................[402]  
d.  
e.  
f.  
C.  
Provincial Heads of Power.............................................................................[409]  
1.  
2.  
Introduction........................................................................................[409]  
Intra-Provincial Designated Projects Fall Within Provincial Heads  
of Power.............................................................................................[410]  
a.  
Section 92A Development and Management of Natural  
Resources ...............................................................................[411]  
Section 109 Proprietary Rights as Owners of Public  
b.  
Lands ....................................................................................[414]  
Section 92(5) Management of Public Lands.......................[416]  
Section 92(10) Local Works and Undertakings..................[417]  
Section 92(13) Property and Civil Rights...........................[418]  
Section 92(16) Local or Private Matters.............................[420]  
c.  
d.  
e.  
f.  
D.  
Conclusions on Classification........................................................................[421]  
XV. Conclusion on Validity of the IAA and Severance.....................................................[425]  
XVI. Interjurisdictional Immunity......................................................................................[428]  
XVII. Conclusion ............................................................................................................[431]  
_______________________________________________________  
Opinion  
_______________________________________________________  
I. Introduction  
[1]  
Sustainable economic development cannot be achieved without a sustainable healthy  
environment and society. Since we all want a healthy biosphere in which to live, we expect our  
governments to make informed decisions about proposed larger scale projects in this country in a  
careful and precautionary manner. The utility therefore of environmental impact assessments of  
such projects to determine their environmental, social, economic and health impacts is undisputed.  
That has been unanimously recognized by the four governments and all intervenors who  
participated in this Reference. Indeed, without exception, every government in this country has, in  
aid of responsible stewardship of the environment, enacted comprehensive environmental  
assessment processes to evaluate the benefits and burdens of significant proposed infrastructure  
and resource activities.  
[2]  
Times of great change often lead to pressures to centralize power. Popular thinking may  
consider a central government best suited to manage whatever change dominates public discourse.  
Today, that discourse most certainly includes climate change. The increasing frequency of weather  
events related to climate change and their detrimental effects are evident; the need to act with  
urgency on this front undeniable. But this should not be confused with the issue at stake here.  
[3]  
This Reference is not about the legitimate concerns all governments and citizens have today  
about climate change nor how best to address them. Nor is it about the anxiety many rightly feel  
about this subject. Rather, the issue before this Court is whether Parliament has overstepped the  
limits of its constitutional mandate under Canada’s Constitution.  
[4]  
The Lieutenant Governor in Council has asked for this Court’s opinion on two questions:1  
1. Is Part 1 of An Act to enact the Impact Assessment Act and the  
Canadian Energy Regulator Act, to amend the Navigation  
Protection Act and to make consequential amendments to other  
Acts, S.C. 2019, c. 28 unconstitutional, in whole or in part, as being  
beyond the legislative authority of the Parliament of Canada under  
the Constitution of Canada?  
2. Is the Physical Activities Regulations, SOR/2019-285,  
unconstitutional in whole or in part by virtue of purporting to apply  
to certain activities listed in Schedule 2 thereof that relate to matters  
1
The Order in Council was issued under s 26 of the Judicature Act, RSA 2000, c J-2.  
Page: 2  
entirely within the legislative authority of the Provinces under the  
Constitution of Canada?  
Part 1 of this legislation consists only of the Impact Assessment Act, SC 2019, c 28, s 1 [Act]. We  
sometimes refer to the Act and the Physical Activities Regulations, SOR/2019-285 [Regulations]  
collectively as the “IAA” or the “legislative scheme”.  
[5]  
[6]  
For reasons explained in this Opinion, the Act and Regulations are unconstitutional.  
Climate change constitutes an existential threat to Canada.2 But climate change is not the  
only existential threat facing this country. The IAA involves another existential threat one also  
pressing and consequential and that is the clear and present danger this legislative scheme  
presents to the division of powers guaranteed by our Constitution and thus, to Canada itself. This  
Reference shines a spotlight on the crucial feature of federalism built into our constitutional  
framework. History teaches that government by central command rarely works in a geographically  
large country with a diverse population and divergent regional priorities. In most major democratic  
countries in the world, federalism and its associated principle, subsidiarity, have been insisted upon  
by the governed. That includes Canada which, by deliberate choice, is a federation not a unitary  
state.  
[7]  
Federalism is fundamental to Canada’s existence: Reference re Secession of Quebec,  
[1998] 2 SCR 217 at paras 37, 55-60 [Secession Reference].3 And what is fundamental to  
Canada’s model of federalism is preservation of the carefully calibrated division of powers  
between the federal and provincial governments4 set out in Part VI of the Constitution Act, 1867,  
as amended.5  
[8]  
Legislative power is divided and balanced between Parliament and provincial Legislatures  
mainly through an allocation of mutually exclusive heads of legislative power. Most federal  
powers are those vested exclusively in Parliament under s 91 and s 92(10)(a), (b) and (c) of the  
Constitution Act, 1867. Provincial powers include those legislative powers vested exclusively in  
provincial Legislatures under s 92 of the Constitution Act, 1867 as well as the proprietary powers  
flowing from the provinces’ ownership of their natural resources under s 109. They also include  
2
References re Greenhouse Gas Pollution Pricing Act, 2021 SCC 11 at paras 167, 171 [References re Greenhouse  
Gas Pollution Pricing Act SCC].  
3
See also Liquidators of the Maritime Bank of Canada v Receiver-General of New Brunswick, [1892] AC 437 at  
441-43 (PC); In Re the Initiative and Referendum Act, [1919] AC 935 at 942 (PC); Re: Resolution to Amend the  
Constitution, [1981] 1 SCR 753 at 905-9.  
4
In this Opinion, we include territorial governments within the phrase provincial governments unless the context  
otherwise requires.  
5
30 & 31 Vict, c 3 (UK), reprinted in RSC 1985, Appendix II, No 5. This includes s 92A, which was added as an  
amendment to the Constitution Act, 1867 as part of the Constitution Act, 1982, s 50, being Schedule B to the Canada  
Act 1982 (UK), 1982, c 11.  
Page: 3  
those allocated to the provinces under s 92A(1) with respect to non-renewable natural resources,  
forestry resources and sites and facilities for generation and production of electrical energy  
(sometimes referred to as “92A natural resources”) in their province. Reserving meaningful powers  
to provincial governments remains a key objective of federalism: Canadian Western Bank v  
Alberta, 2007 SCC 22 at para 22, [2007] 2 SCR 3 [Canadian Western Bank].  
[9]  
Under the Constitution, the “environment” is not a head of power assigned to either  
Parliament or provincial Legislatures: Friends of the Oldman River Society v Canada (Minister  
of Transport), [1992] 1 SCR 3 at 63 [Oldman River].6 That being so, when either government  
level legislates for purposes relating to the environment, that legislation must be linked to a specific  
head of power within its jurisdiction. A meritorious motive protection of the environment does  
not by itself found constitutional jurisdiction for either level of government. Accordingly,  
Parliament is not entitled, on the basis that Canadians nationally share legitimate concerns about  
the environment and climate change, to legislate and regulate on the environment generally. Nor  
is Parliament entitled to require federal oversight and approval of intra-provincial activities  
otherwise within provincial jurisdiction on the basis of the environmental effects of those projects,  
and factors, not linked, or not sufficiently linked, to a federal head of power. And yet this  
legislative scheme authorizes just that.  
[10] There is a long history here. The IAA is a classic example of legislative creep. The federal  
government appears to have taken the Supreme Court decision in Oldman River upholding the  
federal government’s Environmental Assessment and Review Process Guidelines Order, SOR/84-  
467 [Guidelines Order] as a license to systematically expand federal powers under the  
environmental umbrella. The IAA, with its intrusions into provincial jurisdiction, is far removed  
from the federal environmental assessment legislation that the Supreme Court found constitutional  
in Oldman River. The assessment process under the Guidelines Order did not include the  
usurpations of provincial jurisdiction embedded in the IAA. It was also procedural only, a planning  
tool and integral component of sound decision-making.7 Its purpose was to provide the federal  
decision maker with an objective basis for granting or denying permits or approvals required for a  
proposed development under federal legislation. But the IAA extends well beyond this.  
[11] The full scope of this legislative scheme is revealing. It is both an impact assessment and  
regulatory regime. It provides for a comprehensive impact assessment process to assess the  
“effects” of certain physical activities carried out in Canada. That includes any physical activity  
designated as a “designated project” by the Governor in Council under the Regulations or by the  
6
The concepts of the “environment” and “health” are “vague” and “general”: References re Greenhouse Gas  
Pollution Pricing Act at para 53.  
7
The basic concepts are “early identification and evaluation of all potential environmental consequences of a proposed  
undertaking” and “decision making that both guarantees the adequacy of this process and reconciles, to the greatest  
extent possible, the proponent’s development desires with environmental protection and preservation”: Oldman River  
at 71, citing Roger Cotton & D. Paul Emond, “Environmental Impact Assessment” in John Swaigen, ed,  
Environmental Rights in Canada (Toronto: Butterworths, 1981) 245 at 247.  
Page: 4  
Minister of the Environment under the Act (sometimes referred to as “designated projects” or  
“designated project” and the Governor in Council and Minister of Environment sometimes referred  
to collectively as the “federal executive”).8  
[12] A number of physical activities subject to the Act are within exclusive federal jurisdiction.9  
Some have been prescribed as designated projects (“federal designated projects”). No one  
challenges this scheme as it relates to activities within exclusive federal jurisdiction, including  
federal designated projects.  
[13] A number of physical activities prescribed as designated projects though involve intra-  
provincial activities which otherwise fall within exclusive provincial jurisdiction under several  
heads of provincial power: s 92A(1) (development and management of natural resources); s 109  
(proprietary rights as owners of public lands); s 92(5) (management of public lands); s 92(10)  
(local works and undertakings); s 92(13) (property and civil rights); and s 92(16) (local or private  
matters). The focus of this Reference has been on the constitutional validity of the IAA when  
applied to those intra-provincial activities designated as “designated projects” (sometimes referred  
to as “intra-provincial designated projects” or “intra-provincial designated project”). Inclusion of  
an intra-provincial activity within this scheme is triggered merely by its designation as a designated  
project by the federal executive.  
[14] Through this legislative scheme, Parliament has also imposed a regulatory regime on all  
intra-provincial designated projects on provincially-owned as well as provincially-controlled  
lands. That has been accomplished through a number of means including a public interest  
determination by the federal executive and related decision statement. In the result, the IAA  
regulates matters within provincial competence as well as federal competence.  
[15] Some intra-provincial designated projects may require a permit, license or authorization  
(sometimes referred to as a “federal permit”) under other valid federal legislation allowing the  
project to be carried out. But others may not. Intra-provincial designated projects include both.  
The scheme is not restricted to intra-provincial activities requiring a federal permit, in other words  
activities in respect of which a federal authority has some decision-making authority under valid  
and applicable federal legislation independent of this scheme. Instead, the IAA regulates all intra-  
provincial designated projects even where there is no such federal decision-making. And therein  
lies one instance of federal jurisdictional overreach under the IAA.  
8
Section 2 defines designated project as follows: “designated project means one or more physical activities that (a)  
are carried out in Canada or on federal lands; and (b) are designated by regulations made under paragraph 109(b) or  
designated in an order made by the Minister under subsection 9(1). It includes any physical activity that is incidental  
to those physical activities, but it does not include a physical activity designated by regulations made under paragraph  
112(1)(a.2).”  
9
Parliament has exclusive jurisdiction to enact laws in relation to federally-owned and federally-controlled property  
and territory and works and undertakings under ss 91 and 92(10)(a), (b) and (c) in addition to its “Peace, Order, and  
good Government” (POGG) power.  
Page: 5  
[16] The impact assessment required for intra-provincial designated projects includes not only  
their environmental impacts but a wide range of economic, social, cultural and heritage impacts.  
The definitions under the Act sweep within its purview all aspects of the environment no matter  
how untethered they may be, when applied to intra-provincial designated projects, to federal heads  
of power. The Act touches land, water, air, flora, fauna and energy which pretty well covers the  
entire biosphere known to mankind. It is also aimed at social, economic, cultural, humanist and  
historical topics which pretty well covers all aspects of human life within the biosphere. The Act  
also has within it unilaterally expandable schedules as to the types of construction, development,  
business, commerce and other intra-provincial activities that the federal government may choose  
to bring under its scrutiny as designated projects. Thus, it covers all those things too.  
[17] Under the Act, Parliament has regulated what it has defined as “effects within federal  
jurisdiction” from a designated project and what it characterizes as “adverse effects within federal  
jurisdiction” from that project. It has self-defined “effects within federal jurisdiction” as various  
changes or impacts to the environment, health, social or economic matters from or by a designated  
project. That is the hook Canada claims anchors its jurisdiction over intra-provincial designated  
projects that do not otherwise require a federal permit. However, while those changes or impacts  
may be “effects within federal jurisdiction” for purposes of the Act, that does not make all of them  
effects within federal jurisdiction for purposes of the division of powers.  
[18] Parliament’s self-definition of “effects within federal jurisdiction” (sometimes referred to  
as “purported federal effects” or “federal effects” and “adverse effects within federal jurisdiction”  
sometimes referred to as “purported adverse federal effects” or “adverse federal effects”) includes  
effects not within its constitutional jurisdiction when applied to intra-provincial designated  
projects namely, the incidental effects of provincial laws (authorizing intra-provincial designated  
projects) on a federal head of power, effects not linked, or not sufficiently linked, to a federal head  
of power and effects that do not even qualify as significant. And therein lies another instance of  
federal jurisdictional overreach under this legislative scheme.  
[19] Further, Parliament has layered onto its self-definition of “effects within federal  
jurisdiction” mandatory factors which must be considered in the impact assessment. Again, some  
are not within Canada’s jurisdiction when applied to intra-provincial designated projects. The  
federal executive is then empowered to make a substantive decision, a “public interest  
determination”, with respect to each intra-provincial designated project taking into account both  
the impact assessment, which itself includes all effects of the project, not simply federal effects,  
and prescribed mandatory factors, again not all of which are within Canada’s jurisdiction as they  
relate to those projects.  
[20] In particular, the federal executive is permitted to use those mandatory factors and all  
effects of an intra-provincial designated project in declining to make the key substantive decision  
required for the project to proceed a positive public interest determination. A positive public  
interest determination means that the federal executive has determined that the intra-provincial  
Page: 6  
designated project is in the public interest.10 Without a positive public interest determination, all  
the prohibitions under the Act continue, meaning that the proponent of an intra-provincial  
designated project is effectively prohibited from proceeding with that project. And without a  
positive public interest determination, the federal executive is under no obligation to identify  
conditions for the project to proceed. And without a positive public interest determination, other  
federal authorities are forbidden from issuing any federal permit required for the intra-provincial  
designated project to proceed. And therein lies an even more fatal instance of federal overreach  
under this legislative scheme.  
[21] For Parliament to empower the federal executive to stop any intra-provincial designated  
project over the objections of the provincial government involved unless the federal executive  
finds the project to be in the public interest constitutes a breathtaking pre-emption of provincial  
legislative authority. The economic life of this country lies largely in the provinces. While some  
may believe the IAA’s primary target is fossil fuel projects, no province should assume that intra-  
provincial highways or light rail transit systems or flood control or wind farms or solar farms or  
any of the innumerable intra-provincial activities a province may decide are needed for its citizens  
would be exempt from the IAA. They would not be.  
[22] Neither government level has the right to define the parameters of its constitutional  
jurisdiction: Desgagnés Transport Inc v Wärtsilä Canada Inc, 2019 SCC 58 at para 140, per  
Wagner CJ and Brown J concurring [Desgagnés Transport]. Instead, the ultimate responsibility  
for defending the dividing line between provincial and federal governments in this country rests  
with the courts: Northern Telecom Canada Ltd v Communication Workers of Canada, [1983]  
1 SCR 733 at 741. Courts do not determine the constitutionality of legislation under the division  
of powers based on the preference of a majority of Canadians or a majority of provinces.  
Majoritarianism is not superior to the Constitution. Indeed, Canada’s Constitution and the Rule of  
Law are protections against majoritarianism.  
[23] In discharging its duty, the courts have no mandate to erase the dividing line and draw  
another: Caron v Alberta, 2015 SCC 56 at para 36, [2015] 3 SCR 511. Rather, the courts must  
respect the structure of government that the Constitution has implemented: Trial Lawyers  
Association of British Columbia v British Columbia (Attorney General), 2014 SCC 59 at para  
26, [2014] 3 SCR 31. The golden thread running through Canada’s Constitution is federalism.  
Hence the need for the courts to maintain an appropriate balance between federal and provincial  
heads of power: Reference re Firearms Act (Can.), 2000 SCC 31 at para 48, [2000] 1 SCR 783  
[Firearms Reference].  
[24] Were the courts to uphold the validity of the IAA, all provincial industries, almost every  
aspect of a province’s economy that the federal government chooses to sweep within the IAA,  
along with a province’s development of its natural resources, would be subject to federal  
10  
We explain in detail later why the public interest determination involves assessing whether the intra-provincial  
designated project overall is in the public interest having regard to federal priorities and policies.  
Page: 7  
regulation, including an effective federal veto. This would undermine the division of powers,  
substantially overriding s 92(5) (management of public lands), s 92(10) (local works and  
undertakings), s 92(13) (property and civil rights) and s 92(16) (local or private matters) of the  
Constitution.  
[25] In addition, it would effectively write s 109 and s 92A(1) out of the Constitution, thereby  
ending the provinces’ constitutional rights to ownership and development of their natural  
resources. To these fundamental rights of Canada’s constitutional makeup, the IAA expresses no  
deference. Instead, this legislative scheme allows the federal government to essentially render  
worthless the natural resources of individual provinces by stopping their development. If upheld,  
the IAA would permanently alter the division of powers and forever place provincial governments  
in an economic chokehold controlled by the federal government.  
[26] Perhaps most troubling, this legislative scheme allows the federal government to pick  
winners and losers, not just in terms of individual intra-provincial designated projects, and  
individual categories thereof, but also in terms of individual provinces. Thus, this legislative  
scheme not only has a corrosive effect on the division of powers, it has an equally corrosive effect  
on the economic health and well-being of citizens of individual provinces. For those Canadians  
living in parts of the country with lesser populations, and, thus, lesser political influence on the  
federal government, the economic and social consequences are especially devastating. True respect  
for federalism is the only defence against this kind of unrestrained federal power.  
[27] This is not an academic matter for western Canada. The early history of Canada prior to  
1930 singled out the prairie provinces for economic inequality compared to other provinces. It was  
only when ecological and economic disaster befell the prairie provinces that they were provided  
with the same ownership and control of public lands and natural resources as the founding  
provinces had retained on Confederation. This was finally achieved by constitutional amendment  
in 1930. But federal government initiatives started to claw back on that constitutional amendment.  
This led to the provinces seeking, and securing, through the addition of s 92A further reinforcement  
and expansion of provincial jurisdiction over 92A natural resources.  
[28] The IAA raises an issue of fundamental fairness. Through this legislative scheme,  
Parliament has taken a wrecking ball to the constitutional right of the citizens of Alberta and  
Saskatchewan and other provinces to have their 92A natural resources developed for their benefit.  
And in doing so, it has also taken a wrecking ball to something else and that is the likelihood of  
capital investment in projects vital to the economy of individual provinces. Capital investment  
does not just happen, especially where the capital investment is measured in the billions, not  
millions of dollars. And it particularly does not happen where, as under this legislative scheme,  
the investing rules are uncertain, unpredictable, unquantifiable and unreliable.  
[29] To deprive Alberta and Saskatchewan, which together have the vast majority of oil and gas  
reserves in this country, of their constitutional right to exploit these natural resources especially  
while the federal government continues to permit the import of hundreds of millions of barrels of  
Page: 8  
oil into Canada from other countries is to reintroduce the very discrimination both provinces  
understood had ended, if not in 1930, then certainly by 1982. To put the extent of those imports in  
perspective, in 2020, a year in which consumption was reduced because of the pandemic, Canada  
imported more than 200,000,000 barrels of oil that year alone, representing 24.3% of total  
consumption of oil in this country.11  
[30] The IAA also brings to the fore legitimate concerns about stranding oil and gas resources  
in this country as the world transitions away from fossil fuels to a greener economy. This transition  
will take time. That is why it is called a transition. That time may be measured in double digits, if  
not three or possibly four decades, particularly if carbon capture, utilization and storage, the use  
of hydrogen and small modular nuclear reactors allow those resources to be developed in, or near,  
a net-zero manner.12 While many may be delighted by the prospect of stranding these resources,  
including Canada’s oil and gas competitors who would thereby enhance their own position for  
markets outside Canada and potentially within Canada too, that enthusiasm may not be shared by  
the provinces that own these resources nor by the citizens of those provinces.13  
[31] Parliament has the authority to legislate to protect the environment. However, it must do  
so in accordance with the Constitution. For reasons explained in detail in this Opinion, we have  
concluded that the subject matter of the IAA is properly characterized as “the establishment of a  
federal impact assessment and regulatory regime that subjects all activities designated by the  
federal executive to an assessment of all their effects and federal oversight and approval”. When  
applied to intra-provincial designated projects, this subject matter does not fall under any heads of  
power assigned to Parliament but rather intrudes impermissibly into heads of power assigned to  
provincial Legislatures by the Constitution Act, 1867.  
[32] Accordingly, the IAA is ultra vires Parliament. Intra-provincial activities requiring a federal  
permit under other valid and applicable federal laws remain subject to those laws but in accordance  
with the terms of such laws, not this legislative scheme.  
[33] In summary, the federal government’s invocation of concerns about the environment and  
climate change that all provincial governments and Canadians share is not a basis on which to tear  
apart the constitutional division of powers.  
11  
Canada Energy Regulator, “Market Snapshot: Crude oil imports decreased in 2020, and so did the cost”, online:  
<https://www.cer-rec.gc.ca/en/data-analysis/energy-markets/market-snapshots/2021/market-snapshot-crude-oil-imp  
orts-decreased-in-2020-and-so-did-the-cost.html> (accessed 7 July 2021). Since daily consumption was estimated at  
2,282,479 barrels a day overall for 2020, the imports that year of 554,700 barrels of oil each day amounted to about  
24.3% of total consumption. The prior year, 2019, Canada imported more than 250,000,000 barrels of oil that year;  
imports that year were about 27.3% of total consumption.  
12  
On April 14, 2021, Alberta signed onto a Memorandum of Understanding originally made between Ontario, New  
Brunswick and Saskatchewan dated December 1, 2019 for the development and deployment of small modular nuclear  
reactors.  
13  
Nor by other democratic nations requiring market access to fossil fuels for crucial purposes during the transition.  
Page: 9  
II. Positions of the Parties  
A.  
Alberta and Intervenors in Support of Alberta  
[34] Alberta argues that the IAA intrudes impermissibly into provincial jurisdiction. It contends  
the IAA is a “Trojan horse”, enabling the federal government, on the pretext of claimed narrow  
grounds of federal jurisdiction, to conduct far-ranging inquiries into matters assigned exclusively  
to the provinces. The result is federal intrusion into areas of core provincial jurisdiction, including  
development of 92A natural resources and local works and undertakings, and an effective federal  
veto over intra-provincial activities and resource development.  
[35] Alberta characterizes the subject matter of the IAA, its pith and substance, as “the  
establishment of a comprehensive impact assessment regime that requires proposed resource  
developments and infrastructure projects to undergo a broad ranging assessment of their impacts,  
environmental and other, and to subject those projects to federal oversight and approval”.14  
[36] Alberta contends that the IAA departs significantly from the predecessor environmental  
assessment legislation and establishes a broad review process that has no jurisdictional connection  
to a federal head of power. Alberta points out that the Regulations designate projects and  
undertakings within exclusive provincial authority, further revealing the extent of the jurisdictional  
overreach. Alberta argues that, in the event this Court concludes the IAA is intra vires, it should  
apply the doctrine of inter-jurisdictional immunity and declare that the IAA does not apply to  
activities and undertakings under exclusive provincial jurisdiction.  
[37] Ontario and Saskatchewan, as well as the Woodland Cree First Nation, the Indian Resource  
Council, the Canadian Taxpayers Federation, the Canadian Association of Petroleum Producers,  
the Canadian Energy Pipeline Association, the Explorers and Producers Association of Canada,  
the Independent Contractors and Businesses Association and the Alberta Enterprise Group all  
intervened in support of Alberta’s position.15 Broadly speaking, these intervenors submit that the  
IAA allows comprehensive federal regulation of intra-provincial activities that do not fall within  
Parliament’s jurisdiction. A number also assert that the IAA represents an attempt by the federal  
government to regulate the management and development of 92A natural resources and undo the  
negotiated compromise agreement reflected in s 92A.  
14  
Factum of the Attorney General of Alberta at para 44.  
15  
Most intervenors endorse the characterization of the pith and substance of the IAA proposed by the level of  
government whose position they support. Some, however, suggested alternative characterizations. For example, the  
Canadian Association of Petroleum Producers: “To establish a comprehensive impact assessment regime to determine  
whether designated infrastructure or resource development projects are consistent with federal objectives and  
policies”.  
Page: 10  
[38] The Woodland Cree and the Indian Resource Council further contend that the IAA  
encroaches on the independence of First Nations groups, unduly restricting their ability to exploit  
their natural resources and represent their peoples. In particular, they argue that the IAA infringes  
on their Aboriginal and treaty rights as protected by s 35 of the Constitution.  
B.  
Canada and Intervenors in Support of Canada  
[39] Canada defends the IAA on the basis it deals only with matters within federal jurisdiction.  
It characterizes the IAA as being focussed merely on the “adverse effects within federal  
jurisdiction” from designated projects, arguing that the Regulations focus on large projects with  
the greatest potential for adverse effects within federal jurisdiction. Canada asserts the federal  
government is entitled to take into account the public interest in deciding whether, and if, it will  
impose conditions on the proponents of projects that will have “adverse effects within federal  
jurisdiction”. And it contends that the decision provisions of the Act restrain the outcome of an  
assessment to “adverse effects within federal jurisdiction”.  
[40] Canada characterizes the subject matter of the IAA as follows:16  
To establish a federal environmental assessment process to protect  
against adverse environmental effects:  
a.  
b.  
on matters within federal jurisdiction (as listed in s 7);  
in the exercise of federal regulatory power in other existing  
federal schemes (s 8); and  
c.  
in relation to projects carried out on federal Crown lands, or  
by federal authorities outside Canada, or which engage the  
provision of financial assistance (ss 81-91).  
[41] Canada submits that the IAA relates to multiple heads of federal jurisdiction and, depending  
on the factual context of a particular project, one or more federal heads of power may be engaged.  
It asserts that the IAA does not regulate intra-provincial designated projects but merely provides  
for an impact assessment to determine if there are any adverse federal effects caused by such  
projects and, if so, then to prohibit or regulate the same. Canada denies that the IAA creates a  
federal veto. In its view, any federal trespass into works, undertakings or activities within the  
legislative jurisdiction of the province is merely incidental to protection of those aspects of the  
environment within federal legislative jurisdiction.  
[42] Nature Canada, Ecojustice Canada Society, MiningWatch Canada Inc., the Canadian  
Environmental Law Association, Environmental Defence Inc., Athabasca Chipewyan First Nation  
16  
Factum of the Attorney General of Canada at para 24.  
Page: 11  
and Mikisew Cree First Nation intervened in support of Canada. They argue the IAA is a  
precautionary tool aimed at safeguarding federal components of the environment. They contend  
the IAA is well within federal constitutional limits and has ample support under s 91 of the  
Constitution Act, 1867.  
[43] The Athabasca Chipewyan First Nation submit that striking down the IAA would restrict  
Indigenous participation in environmental assessments and preclude consideration of Indigenous  
knowledge. The Mikisew Cree First Nation say that, to the extent the IAA permits the federal  
government to assess and make decisions with respect to the impacts of a designated project on  
Aboriginal and treaty rights, it is a valid exercise of federal jurisdiction.  
[44] Several intervenors allude to the importance of evaluating the IAA in a manner respecting  
cooperative federalism. Ecojustice Canada Society argues that the IAA should be upheld under the  
federal criminal law power.17 The Canadian Environmental Law Association, Environmental  
Defence Inc. and MiningWatch Canada Inc. contend the IAA should also be upheld under the  
federal trade and commerce power.  
III. Relevant Provisions of the Constitution  
A.  
Constitution Act, 1867  
[45] The key provisions of the Constitution Act, 1867 follow:  
1.  
Federal Legislative Powers  
91. It shall be lawful for the Queen, by and with the Advice and  
Consent of the Senate and House of Commons, to make Laws for  
the Peace, Order, and good Government of Canada, in relation to all  
Matters not coming within the Classes of Subjects by this Act  
assigned exclusively to the Legislatures of the Provinces; and for  
greater Certainty, but not so as to restrict the Generality of the  
foregoing Terms of this Section, it is hereby declared that  
(notwithstanding anything in this Act) the exclusive Legislative  
Authority of the Parliament of Canada extends to all Matters coming  
within the Classes of Subjects next hereinafter enumerated; that is  
to say,  
...  
1A. The Public Debt and Property.  
17  
Ecojustice Canada Society proposed an alternative characterization of the “matter” of the IAA: “To establish a  
federal environmental assessment process to safeguard against adverse environmental effects on certain matters within  
federal jurisdiction.”  
Page: 12  
2. The Regulation of Trade and Commerce.  
...  
12. Sea Coast and Inland Fisheries.  
...  
24. Indians, and Lands reserved for the Indians.  
...  
27. The Criminal Law ...  
...  
29. Such Classes of Subjects as are expressly  
excepted in the Enumeration of the Classes of  
Subjects by this Act assigned exclusively to the  
Legislatures of the Provinces.  
And any Matter coming within any of the Classes of Subjects  
enumerated in this Section shall not be deemed to come within the  
Class of Matters of a local or private Nature comprised in the  
Enumeration of the Classes of Subjects by this Act assigned  
exclusively to the Legislatures of the Provinces. [Emphasis added]  
132. The Parliament and Government of Canada shall have all  
Powers necessary or proper for performing the Obligations of  
Canada or of any Province thereof, as Part of the British Empire,  
towards Foreign Countries, arising under Treaties between the  
Empire and such Foreign Countries.  
2.  
Provincial Legislative Powers  
92. In each Province the Legislature may exclusively make Laws in  
relation to Matters coming within the Classes of Subjects next  
hereinafter enumerated; that is to say,  
...  
5. The Management and Sale of the Public Lands belonging  
to the Province ...  
...  
Page: 13  
10. Local Works and Undertakings other than such as are of  
the following Classes:  
(a)  
Lines of Steam or other Ships, Railways, Canals,  
Telegraphs, and other Works and Undertakings  
connecting the Province with any other or others of  
the Provinces, or extending beyond the Limits of the  
Province:  
(b)  
(c)  
Lines of Steam Ships between the Province and any  
British or Foreign Country:  
Such Works as, although wholly situate within the  
Province, are before or after their Execution declared  
by the Parliament of Canada to be for the general  
Advantage of Canada or for the Advantage of Two  
or more of the Provinces.  
...  
13. Property and Civil Rights in the Province.  
...  
16. Generally all Matters of a merely local or private Nature  
in the Province.  
B.  
1.  
Key Provisions Added by the Constitution Act, 1982  
Additional Provincial Powers under Amendment to the Constitution Act, 1867  
92A. (1) In each province, the legislature may exclusively make  
laws in relation to  
(a)  
(b)  
exploration for non-renewable natural  
resources in the province;  
development, conservation and management  
of non-renewable natural resources and  
forestry resources in the province, including  
laws in relation to the rate of primary  
production therefrom; and  
(c)  
development, conservation and management  
of sites and facilities in the province for the  
Page: 14  
generation and production of electrical  
energy.  
...  
(6) Nothing in subsections (1) to (5) derogates from any powers or  
rights that a legislature or government of a province had  
immediately before the coming into force of this section.  
2.  
Procedure for Amending the Constitution  
38. (1) An amendment to the Constitution of Canada may be made  
by ...  
(b) resolutions of the legislative assemblies of at least  
two-thirds of the provinces that have, in the  
aggregate, ... at least fifty per cent of the population  
of all the provinces.  
...  
(3) An amendment [that derogates from the legislative powers,  
proprietary rights or any other rights or privileges of the legislature  
or government of a province] shall not have effect in a province the  
legislative assembly of which has expressed its dissent thereto by  
resolution supported by a majority of its members ...  
IV. The Environment and the Division of Powers  
A.  
The Environment is a Constitutionally Abstruse Matter  
[46] The environment has not been assigned to either Parliament or provincial Legislatures  
under the Constitution Act, 1867. Nor has the environment been allocated to the federal  
government under the national concern doctrine.18 If it were, provincial governments would not  
be constitutional equals. They could do what they were permitted by the federal government. And  
nothing more.  
[47] Instead, the courts have recognized that the environment is “a constitutionally abstruse  
matter which does not comfortably fit within the existing division of powers without considerable  
overlap and uncertainty”: Oldman River at 64. Understood generically as encompassing “the  
physical, economic and social”, the “environment” necessarily touches on “several of the heads of  
power assigned to the respective levels of government”: ibid. at 63. Thus, regulation of the  
18  
As noted in Dale Gibson, “Constitutional Jurisdiction over Environmental Management in Canada” (1973) 23:1  
UTLJ 54 at 85 [Gibson]: “it is no less obvious that ‘environmental management’ could never be treated as a  
constitutional unit under one order of government in any constitution that claimed to be federal, because no system in  
which one government was so powerful would be federal.”  
Page: 15  
environment, including regulation of pollution, has some provincial aspects and some federal  
aspects: ibid. at 69; Quebec (Attorney General) v Moses, 2010 SCC 17 at para 36, [2010] 1 SCR  
557 [Moses SCC].  
[48] Both levels of government may affect the environment (either by acting or not acting) but  
only within the legislative powers specifically assigned to each: Oldman River at 65. In other  
words, to be valid, a legislative provision must be “linked to the appropriate head of power”, as in  
“sufficiently linked” to that head of power: ibid. at 67-68. Identifying a specific head of power is  
also important because the extent to which environmental concerns may be taken into account by  
the relevant government will vary based on the scope of the power: ibid. at 67; R v Hydro-Québec,  
[1997] 3 SCR 213 at paras 114, 117 [Hydro-Québec].  
B.  
Environmental Impact Assessments Are Not Within Parliament’s Exclusive  
Jurisdiction  
[49] Neither level of government has exclusive jurisdiction over environmental impact  
assessments. Like the environment more generally, impact assessments are not explicitly  
enumerated as a head of power under ss 91 or 92 of the Constitution Act, 1867. Indeed, both  
Canada and Alberta have long exercised their jurisdiction in this area. Alberta has provided for  
environmental impact assessments in legislation since 1973: see The Land Surface Conservation  
and Reclamation Act, SA 1973, c 34, s 8; P.S. Elder, “Environmental Impact Assessment in  
Alberta” (1985) 23:2 Alta L Rev 286 at 296-298. Canada, meanwhile, first set out formal  
regulations dealing with environmental impact assessments in the 1984 Guidelines Order.  
C.  
Joint Federal-Provincial Environmental Accords  
[50] As a consequence of Oldman River, it became apparent that some form of joint approach  
by federal and provincial governments to environmental impact assessments involving intra-  
provincial activities was desirable. To reduce overlap and duplication of environmental  
assessments, the federal government and individual provincial governments have entered into  
various accords.19 For example, since 1993, Canada and Alberta have had a bilateral agreement,  
the Canada-Alberta Agreement for Environmental Assessment Cooperation, which contemplates  
joint panel reviews.20 The most recent version of this non-binding bilateral agreement, the 2005  
Canada-Alberta Agreement on Environmental Assessment Cooperation [Bilateral Agreement] sets  
19  
The Canada-Wide Accord on Environmental Harmonization was signed January 29, 1998 by the Canadian Council  
of Members of the Environment with the exception of Québec. While not legally binding, it signalled an intention at  
both the federal and provincial levels to eliminate overlap and duplication in environmental management matters.  
Three sub-agreements were also approved, including one on Environmental Assessment.  
20  
While the first version of this bilateral agreement dates to 1993, Canada and Alberta had a different earlier bilateral  
agreement in place, that is the Canada-Alberta Accord for the Protection and Enhancement of Environmental Quality  
(8 October 1975).  
Page: 16  
out the mechanisms for conducting a joint panel review, including a framework for determining  
the lead jurisdiction.21  
[51] A cooperative approach between the federal government and a provincial government does  
not mean that the provincial government has relinquished its jurisdiction to the federal  
government. Or vice versa. Neither has a right to cede its constitutional jurisdiction to the other  
whether because of concerns about the environment or climate change or otherwise. If the division  
of powers is to be changed, this must be done by constitutional amendment, not constitutional  
surrender.  
V. History of Prairie Provinces - Ownership of Natural Resources and Section 92A  
[52] To appreciate the intended scope of provincial power over natural resources, a brief review  
of the constitutional history of how the prairie provinces came to acquire ownership and control  
of these resources is warranted.  
A.  
Prairie Provinces Secure Ownership of Their Natural Resources  
[53] Unlike other provinces, for decades following their entering into Confederation, the prairie  
provinces were denied ownership of the natural resources in their provinces. When Alberta became  
a province in 1905, the Alberta Act, 4 & 5 Edw. VII, c 3, s 21 continued to vest all Crown lands,  
including mines and minerals, in the federal Crown. Saskatchewan was not granted ownership of  
its resources either when it became a province that same year. Nor was Manitoba when it entered  
Confederation decades earlier in 1870.  
[54] This finally changed with the Natural Resources Acts passed in 1930 by Parliament and  
the Legislatures in each of Alberta, Saskatchewan and Manitoba.22 These Natural Resources Acts  
incorporated Memorandums of Agreement made between the Dominion of Canada and each  
province dated December 14, 1929. The Agreements explicitly recognized both as a recital and in  
their operative provisions that the prairie provinces had been in a position of inequality vis à vis  
other provinces because they did not own their natural resources. In particular, as set out in the  
preamble to each, the intent was to put each signing province “in a position of equality with the  
other provinces of Confederation with respect to the administration and control of its natural  
resources”. The Agreements thus provided that the Dominion of Canada would transfer all Crown  
lands, mines and minerals in each province to that province so that they might be in the same  
position as the original provinces of Confederation.  
21  
It also contemplates that the information generated will be used in the provincial and federal government’s  
respective decision-making: s 6.20. This is subject however to legislation to the contrary at either level.  
22  
See Alberta Natural Resources Act, SC 1930, c 3; Manitoba Natural Resources Act, SC 1930, c 29 and  
Saskatchewan Natural Resources Act, SC 1930, c 41.  
Page: 17  
[55] The British Parliament then passed the British North America Act, 1930, 20-21 Geo. V,  
c 26, (now called the Constitution Act, 1930) and made all their provisions law. As a consequence,  
that Imperial constitutional law entrenched the prairie provinces’ ownership of their natural  
resources in the Constitution, thereby overriding any contrary federal or provincial legislation.23  
This put the prairie provinces in the same position as the provinces (Ontario, Quebec, Nova Scotia  
and New Brunswick) that retained ownership of their natural resources at Confederation under  
s 109 of the Constitution Act, 1867: Gerald V. La Forest, Natural Resources and Public Property  
under the Canadian Constitution (Toronto: University of Toronto Press, 1969) at 34-36 [La  
Forest]; Re Exported Natural Gas Tax, [1982] 1 SCR 1004 at 1055-1056 [Natural Gas Tax].  
[56] Ownership brought the prairie provinces the right to exploit their natural resources and, in  
turn, greater financial security: Natural Gas Tax at 1080. They also gained a number of significant  
new powers, including the power to limit production for conservation purposes: Spooner Oils Ltd  
v Turner Valley Gas Conservation, [1933] SCR 629. They could regulate their newly Crown-  
owned natural resources under s 109 by virtue of s 92(5) of the Constitution Act, 1867. This section  
confers exclusive jurisdiction on the provinces over the management of public lands, including  
mines and minerals. Provincial ownership also provided revenue in the form of royalties from  
Crown leases. As for freehold leases, provinces possess legislative authority to regulate non-  
Crown owned resources by virtue of s 92(13) (property and civil rights) and s 92(16) (local or  
private matters).  
B.  
Federal Government Interventions and Pressures for Constitutional Reform  
[57] Resource ownership provided Alberta with a measure of security over the development of  
its natural resources for over four decades between 1930 and 1973. However, provincial ownership  
rights were still subject to laws enacted by Parliament under its heads of power. This could  
negatively affect property owned by a province without for that reason alone being rendered  
unconstitutional: La Forest at 147-148; Reference re Waters and Water-Powers, [1929] SCR 200  
at 212, 219; Attorney-General for Quebec v Nipissing Central Railway Company, [1926] AC 715  
at 723-724 (PC) [Nipissing Central Railway]. Accordingly, at that stage, ownership rights alone  
were often considered insufficient to determine jurisdiction over a matter.24 After large oil reserves  
were discovered at Leduc in 1947, leading to a rapid expansion of oil production in Alberta,  
Canada implemented several energy policies with wide-ranging effect. That included the National  
Oil Policy of 1961 that divided the country’s oil source between east (foreign) and west  
(domestic).25  
23  
The Newfoundland Act, 1949 12 & 13 Geo. V1, c 22 (UK) placed Newfoundland in the same position. But the  
Terms of Union did not provide for it to retain ownership of offshore oil and gas resources which, absent Union, would  
have arguably belonged to Newfoundland. Under the Atlantic Accord, February 11, 1985, Canada and Newfoundland  
and Labrador finally reached an agreement on the joint management of the province’s offshore oil and gas resources  
and the sharing of revenues from their exploitation.  
24  
See for example Gibson at 60.  
25  
Brendan Downey et al., “Federalism in the Patch: Canada’s Energy Industry and the Constitutional Division of  
Page: 18  
[58] It was not until the 1973 OPEC embargo sharply increased world oil prices that federal  
government actions raised provincial concerns, resulting in escalating actions on both sides.  
Beginning in 1973, the federal government enacted a series of measures which directly affected  
oil and gas resources owned by the provinces. These included an oil export tax, a national market  
for oil and the Petroleum Administration Act, SC 1974-75-76, c 47 [Petroleum Act]. The Petroleum  
Act gave the federal government authority to set oil and gas prices unilaterally. Collectively, these  
actions directly and adversely affected the western provinces: See J. Peter Meekison & Roy J.  
Romanow, “Western Advocacy and Section 92A of the Constitution” in J. Peter Meekison, Roy J.  
Romanow & William D. Moull, eds, Origins and Meaning of Section 92A: The 1982  
Constitutional Amendment on Resources (Montreal: The Institute for Research on Public Policy,  
1985) 3 [Meekison & Romanow].  
[59] As early as 1975, provincial premiers concluded that discussions on the Constitution should  
include a general review of the division of powers and, in particular, the control of natural  
resources, which was put on the agenda at the 1976 First Ministers’ conference: Meekison &  
Romanow at 10. Provincial concerns about the scope of their existing jurisdiction over natural  
resources were further heightened by litigation in Saskatchewan that culminated in two Supreme  
Court decisions, Canadian Industrial Gas & Oil Ltd v Government of Saskatchewan et al, [1978]  
2 SCR 545 [CIGOL] and Central Canada Potash Co Ltd et al v Government of Saskatchewan,  
[1979] 1 SCR 42 [Potash]: Meekison & Romanow at 3, 7-10. In Saskatchewan’s view, those  
decisions undermined the jurisdiction the provinces thought they had over natural resources.  
[60] CIGOL involved Saskatchewan’s attempt to capture the increased value of oil after the  
OPEC embargo.26 Saskatchewan imposed a “mineral income tax” on oil production subject to  
freehold leases and a “royalty surcharge” on Crown leases. The Supreme Court held that because  
most of the oil was for export, the charges were “export taxes”. That meant the province had no  
power to impose either since export taxes involve interprovincial or international trade, a subject  
of federal jurisdiction under s 91(2). The Supreme Court also characterized both the income tax  
and royalty surcharge as “indirect taxes” which provinces are not competent to impose under  
s 92(2).  
[61] In Potash, the Supreme Court struck down Saskatchewan’s rationing scheme aimed at  
controlling the amount of potash produced in the province. It held that notwithstanding a  
province’s general ability to control the production of its natural resources, since most of the potash  
was marketed outside the province, the scheme was an impermissible intrusion on federal  
jurisdiction over interprovincial and international trade under s 91(2).  
Powers” (2020) 58:2 Alta L Rev 273 at 276.  
26  
The litigation was a battle between a province and the private sector: Robert D. Cairns et al., “Constitutional Change  
and the Private Sector: The Case of the Resource Amendment” (1986) 24:2 Osgoode Hall L J 299 at 301, 308.  
Page: 19  
[62] Given this history, by 1978, Alberta and Saskatchewan led the negotiations on behalf of  
the provinces for a constitutional amendment that would expressly confirm and strengthen the  
provinces’ ability to develop, manage and control their natural resources. This was partly in  
response to the federal government’s having that same year tabled a constitutional amendment bill  
omitting any reference to s 109 of the Constitution Act, 1867. Provincial concerns also related to  
resource taxation, the federal declaratory power, the federal emergency power and indirect  
taxation: Meekison & Romanow at 10-14.  
[63] In 1980, further tensions arose when the federal government introduced the National  
Energy Program (NEP) and invoked those parts of the Petroleum Act enabling it to unilaterally  
establish prices for oil and natural gas. It was the federal government’s view that the rest of Canada,  
and not just the oil producing provinces, should benefit financially from the rapid rise in oil prices.  
Alberta disagreed. So too did other western provinces. As explained in Meekison & Romanow at  
24: “The NEP was seen by the three western provinces as a major assault on provincial ownership  
and jurisdiction over resources”.  
C.  
1.  
Constitutional Compromise  
Section 92A Resource Amendment  
[64] Developments in September 1981 set the stage for a negotiated agreement to resolve the  
constitutional impasse over resource control and management. First, the Supreme Court found the  
federal government’s unilateral attempt to patriate the Constitution contrary to constitutional  
convention: Re: Resolution to amend the Constitution, [1981] 1 SCR 753. Second, Alberta and  
the federal government signed an oil and gas pricing and revenue sharing agreement that brought  
the immediate dispute over the NEP to an end: Howard Leeson, The Patriation Minutes  
(Edmonton: Centre for Constitutional Studies, Faculty of Law, University of Alberta, 2011) at 13,  
23.  
[65] It was against this background that the federal and provincial governments finally reached  
a compromise regarding provincial powers over natural resources which allowed the Constitution  
to be patriated.27 For Alberta and Saskatchewan, two key components of that compromise, which  
were part of the patriation package signed April 17, 1982, were the inclusion of s 92A (sometimes  
called the “Resource Amendment”) in Part VI of the Constitution Act, 1982 which amended the  
Constitution Act, 1867, and s 38, the opt-out right, under the amending formula in Part V of the  
Constitution Act, 1982.  
[66] Section 92A provides for exclusive provincial jurisdiction in three areas: (i) exploration for  
non-renewable natural resources; (ii) the development, conservation and management of non-  
renewable natural resources and forestry resources; and (iii) the development, conservation and  
management of sites and facilities for the generation and production of electrical energy  
27  
Québec did not agree to the terms of patriation.  
Page: 20  
(s 92A(1)). It also provides for concurrent or non-exclusive jurisdiction in two areas: (i) the export  
of natural resources from the province (s 92A(2)); and (ii) taxing powers over natural resources  
(s 92A(4)).  
2.  
Section 38 Opt-Out Right  
[67] Section 38, the opt-out right, which was part of the constitutional compromise, informs the  
purpose and intended scope of s 92A. Alberta and Saskatchewan had insisted that provinces’  
proprietary rights to their natural resources, including their development rights under s 92A, be  
protected in any constitutional amending formula. Thus, the general amending formula under  
s 38(1) of the Constitution Act, 1982 (requiring an agreement by at least 2/3 of the provinces with  
at least 50% of the Canadian population and the federal government) is subject to a further  
limitation, an opt-out right which protects the provinces’ control over their natural resources.  
[68] That opt-out right, set out in s 38(3) of the Constitution Act, 1982, allows an individual  
province to opt out of any future constitutional amendment that derogates from the legislative  
powers, proprietary rights or any other rights or privileges of a province.28 This was designed to  
ensure that no constitutional amendment in the future could strip any province of its proprietary  
rights and its exclusive right, confirmed in s 92A, to develop its natural resources for the benefit  
of its citizens. In other words, when Premiers Allan Blakeney and Peter Lougheed insisted on the  
inclusion of s 92A and the opt-out right as conditions of agreeing to patriation of the Constitution,  
they took the steps necessary to protect their citizens against future legislative intrusion by other  
governments, including the federal government.  
3.  
Section 36 Economic Development and Equalization  
[69] The Constitution Act, 1982 also included s 36 which provides:  
36. (1) Without altering the legislative authority of Parliament or of  
the provincial legislatures, or the rights of any of them with respect  
to the exercise of their legislative authority, Parliament and the  
legislatures, together with the government of Canada and the  
provincial governments, are committed to  
(a) promoting equal opportunities for the well-being of Canadians;  
(b) furthering economic development to reduce disparity in  
opportunities; and  
28  
Under s 38(3), if an amendment under the prescribed amending formula in s 38(2) derogates from the legislative  
powers, proprietary rights or any other rights or privileges of a province, then under s 38(3), that amendment shall  
have no effect in a province that opts out of the amendment.  
Page: 21  
(c) providing essential public services of reasonable quality to all  
Canadians.  
(2) Parliament and the government of Canada are committed to the  
principle of making equalization payments to ensure that provincial  
governments have sufficient revenues to provide reasonably  
comparable levels of public services at reasonably comparable  
levels of taxation. [Emphasis added]  
[70] This part of the constitutional bargain on patriation commits both the federal and provincial  
governments and Parliament and the Legislatures to “promoting equal opportunities for the well-  
being of Canadians” and “furthering economic development to reduce disparity in opportunities”:  
ss 36(1)(a) and (b), emphasis added. It also commits Parliament and the government of Canada to  
make “equalization payments to ensure that provincial governments have sufficient resources to  
provide reasonably comparable levels of public services at reasonably comparable levels of  
taxation”: s 36(2). Sections 36(1)(a) and (b) established a means whereby the federal government’s  
commitment to equalization payments would be assisted by the provinces having equal  
opportunities and being able to further their economic development. These sections were  
important, not just as aspirational statements, but to underscore equality of opportunity for  
development of a province’s natural resources.  
[71] Since patriation, Alberta has contributed to the federal government hundreds of billions of  
dollars more than it has received.29 These funds have in turn assisted the federal government in its  
financial capacity to make equalization payments to other provinces. Alberta’s agreement to s 36,  
including the concept of equalization payments, was based not only on the inclusion of the  
Resource Amendment and the s 38 opt-out right but also on the federal government’s commitment  
to further economic development.  
4.  
Conclusion  
[72] In summary, s 92A represents a clear, deliberate negotiated amendment to the Constitution  
intended to assure exclusive provincial jurisdiction over the exploration, development,  
29  
Alberta has not received equalization payments for decades: Trevor Tombe, “'Final and Unalterable' — But Up for  
Negotiation: Federal-Provincial Transfers in Canada” (2018) 66:4 Canadian Tax Journal 871. Net federal fiscal  
transfers by Alberta, which include money for equalization payments, money for the Canada Health Transfer and  
money for the Canada Social Transfer totalled $240 billion for the 12 years alone from 2007 to and including 2018:  
Statistics Canada, “Revenue, expenditure and budgetary balance - General governments, provincial and territorial  
economic  
accounts  
(x  
1,000,000)”,  
online:  
(2021)  
<https://www150.statcan.gc.ca/t1/tbl1/en/tv.action?pid=3610045001>. In 2020, because of the pandemic, Alberta,  
like every other provincial government in this country, received more than it contributed to the federal government.  
That, of course, is because the federal government has incurred substantial debt to support Canadians through the  
pandemic.  
Page: 22  
management and conservation of a province’s 92A natural resources. 30 Nor can s 92A be  
interpreted in a constitutional vacuum. It is directly linked to other provisions critical to the  
provinces’ agreement to patriation, namely the amending formula, the provincial opt-out right  
under s 38(3) and the provisions under s 36 of the Constitution Act, 1982. This was the  
constitutional bargain made. And it is one the provinces are entitled to have honoured. To borrow  
a phrase from Beetz J in Bell Canada v Quebec (Commission de la santé et de la sécurité du  
travail), [1988] 1 SCR 749 at 840, the constitutional amendments agreed to on patriation could  
have been different, but they are not.31  
D.  
Role of the Courts  
[73] Under the Constitution Act, 1982, the power to amend the Constitution was given  
exclusively to the legislative branch. Accordingly, the courts should not permit judicial decisions  
to be used to sidestep the amending formula and render the opt-out right nugatory. As Lord Sankey  
cautioned in In Re The Regulation and Control Of Aeronautics In Canada, [1932] AC 54 at 70,  
judicial interpretation should not be allowed “to dim or to whittle down the provisions of the  
original contract upon which the federation was founded”.32 Or, we would add, the constitutional  
amendments agreed to on patriation. Incremental changes in favour of the federal government,  
once sanctioned, may well encourage the federal government to expand its jurisdictional reach  
further yet. And if that expansion should then be approved by the courts, it becomes difficult to  
deny that the Constitution has been amended by judicial fiat.33 Thus, the courts must ensure that  
the constitutional bargain agreed to on patriation is respected and the division of powers dividing  
line maintained.  
30  
Section 92A(6) makes it clear that nothing in s 92A reduces the provinces’ powers under other provisions in the  
Constitution. It does not limit in any way the province’s ownership rights under s 92(5) and s 109 of the Constitution  
Act, 1867.  
31  
Beetz J stated, in reference to Parliament’s power over federal undertakings including in respect of employer-  
employee relations: “If this power is exclusive, it is because the Constitution, which could have been different but is  
not, expressly specifies this to be the case; and it is because this power is exclusive that it pre-empts that of the  
legislatures both as to their legislation of general and specific application, in so far as such laws affect a vital part of  
a federal undertaking. The exclusivity rule is absolute and does not allow for any distinction between these two types  
of statute.”  
32  
In warning about judicial interpretations moving away from the original meaning of the text “from what has been  
enacted to what has been judicially said about the enactment”, Lord Sankey added this at 70: “To borrow an analogy;  
there may be a range of sixty colours, each of which is so little different from its neighbour that it is difficult to make  
any distinction between the two, and yet at the one end of the range the colour may be white, and at the other end of  
the range black. Great care must therefore be taken to consider each decision in the light of the circumstances of the  
case in view of which it was pronounced, especially in the interpretation of an Act such as the British North America  
Act, which was a great constitutional charter, and not to allow general phrases to obscure the underlying object of the  
Act, which was to establish a system of government upon essentially federal principles. Useful as decided cases are,  
it is always advisable to get back to the words of the Act itself and to remember the object with which it was passed.”  
33  
Hogg has made this point in the context of amending the Constitution through judicial law-making and the  
“discovery (meaning invention) by the courts of ‘unwritten constitutional principles’ ....”: Peter Hogg & Wade Wright,  
Constitutional Law of Canada, 5th ed (Toronto: Carswell, 2007) (loose-leaf updated 2021) at §15:28 [Hogg].  
Page: 23  
VI. The Purpose and Scope of the Resource Amendment  
Introduction  
A.  
[74] Some seem to think, or prefer to think, that s 92A is a constitutional nothing. And that it  
merely affirmed the powers provinces already had as owners of their natural resources. But the  
historical record with respect to the negotiations leading up to its inclusion in the Constitution and  
the actual wording of the constitutional text indicate otherwise. The addition of s 92A to Canada’s  
Constitution was not a gift from the federal government to the provinces; it was a negotiated  
compromise. There is no doubt that the provinces understood that s 92A added to their jurisdiction.  
To secure the federal government’s agreement to the addition of s 92A took more than two years  
of hard-fought negotiations. In exchange for the agreement of Alberta and Saskatchewan, and other  
provinces as well, to patriate the Constitution, the federal government agreed to include s 92A in  
the Constitution.  
[75] Neither Parliament nor Legislatures enact for no reason: Alberta (Education) v Canadian  
Copyright Licensing Agency (Access Copyright), 2012 SCC 37 at para 47, [2012] 2 SCR 345, per  
Rothstein J (in dissent but not on this point). Nor do either intend words used in legislation to be  
redundant: Medovarski v Canada (Minister of Citizenship and Immigration); Esteban v Canada  
(Minister of Citizenship and Immigration), 2005 SCC 51 at para 31, [2005] 2 SCR 539.  
Therefore, no legislative provision should be interpreted so as to render it mere surplusage: R v  
Proulx, 2000 SCC 5 at para 28, [2000] 1 SCR 61. That interpretive approach applies with even  
more force to constitutional amendments. Changes are not made to a constitution for no purpose.  
B.  
Purpose of the Resource Amendment  
[76] Prior to the Resource Amendment, the provincial governments were well aware how their  
proprietary rights as owners of their natural resources had been curtailed. To eliminate ambiguity  
and ensure that a full array of both legislative and proprietary powers were available to the  
provinces as owners of their 92A natural resources, the provinces sought, and secured, a  
constitutional amendment that defined with precision exactly what provincial governments had the  
exclusive jurisdiction to do as owners of those resources.  
C.  
Scope of the Resource Amendment  
[77] The significance of the Resource Amendment was noted by William D. Moull in “Natural  
Resources and Canadian Federalism: Reflections on a Turbulent Decade” (1987) 25:2 Osgoode  
Hall LJ 411 at 413 [Moull]:  
[The Resource Amendment] was the only component of the 1982  
constitutional patriation package that purported to alter the division  
of federal-provincial legislative powers, and it represents the first  
Page: 24  
amendment to the Constitution since Confederation that has had the  
effect of enhancing the legislative authority of the provinces.  
[78] What then is the scope of provincial jurisdiction under s 92A? Rather than merely add to  
the catalogue of heads of power under s 92, s 92A(1) sets out in detail the provinces’ exclusive  
powers vis à vis their 92A natural resources. In particular, s 92A(1) expressly provides that “[i]n  
each province, the legislature may exclusively make laws in relation to (a) exploration for non-  
renewable natural resources in the province; (b) development, conservation and management of  
non-renewable natural resources and forestry resources in the province ...; and (c) development,  
conservation and management of sites and facilities in the province for the generation and  
production of electrical energy” (emphasis added).  
[79] Provincial powers under s 92A are very broad, extending from one end of the exploitation  
of 92A natural resources, exploration, to the other end, export and everything in between,  
covering as they do exploration, development, management and conservation. The wording under  
s 92A was not simply prudent drafting about the scope of provincial jurisdiction. It was designed  
to assure provincial governments that the powers listed therein, all of which are also consistent  
with proprietary rights, were within their exclusive control. Section 92A(6) reinforces the  
exclusivity of provincial powers under s 92A(1). It provides that nothing in subsections (1) to (5)  
derogates from any rights or powers that a legislature or government of a province had immediately  
before the coming into force of s 92A.34  
[80] Hence, the extent to which the IAA interferes with provincial jurisdiction must be assessed  
in light of the provinces’ powers under s 92A(1). This section is not constitutionally inferior to ss  
91 or 92. To the extent ambiguity existed with respect to a province’s exclusive right to exploit the  
92A natural resources it owned, s 92A put this beyond doubt. No principled reason exists to  
diminish the full import of the exclusive jurisdiction conferred on the provinces under s 92A(1).  
D.  
Significance of the Resource Amendment  
[81] Section 92A does not override Parliament’s “Peace, Order, and good Government”  
(POGG) power nor its powers under both s 92(10)(a) vis à vis interprovincial undertakings and s  
92(10)(c) to declare a work or undertaking for the benefit of Canada or two or more provinces:  
Ontario Hydro v Ontario (Labour Relations Board), [1993] 3 SCR 327 [Ontario Hydro];  
Westcoast Energy Inc. v Canada (National Energy Board), [1998] 1 SCR 322 at paras 80-84.35  
But short of the proper invocation of these powers, the purpose of s 92A, when passed, was to  
ensure that the approval of projects for the exploration, development, conservation and  
management of 92A natural resources was vested exclusively in the province that owned them.  
34  
Section 92A does not contain a reciprocal provision in favour of Parliament or the federal government. While  
Parliament’s jurisdiction is addressed in s 92A(3), that is only with respect to Parliament’s authority to enact laws in  
relation to the matters referred to in s 92A(2), that is relating to the export of natural resources from a province.  
35  
Or Parliament’s powers under s 92(10)(b).  
Page: 25  
[82] Provincial jurisdiction over natural resources is “one of the mainstays of provincial power”:  
Ontario Hydro at 376. Deciding the terms and conditions under which a project to exploit these  
natural resources will be constructed and operated goes directly to a province’s power to decide  
how best to manage, and the conditions under which it will permit the development of, its 92A  
natural resources. That is inextricably linked in turn to a crucial concern of any provincial  
government, namely its economy.  
[83] Provincial governments should not be faulted for focussing their attention on matters  
important to their citizens. That includes not only the environment but also the economy. It is a  
false dichotomy to suggest that the two are mutually exclusive. Without a strong economy, a  
province’s ability to respond to the needs of its citizens, including meeting the challenges of  
climate change, is diminished. Moreover, if a provincial government is not responsible and  
accountable for managing its economy and natural resources for the benefit of its citizens, then  
who is?  
VII. Overview of Environmental Impact Assessment Legislation Federally  
A.  
1.  
Brief Historical Review of Federal Legislation  
Environmental Assessment and Guidelines Order  
[84] The first mandatory federal environmental assessment process was the Guidelines Order  
issued in 1984 under the Department of the Environment Act, RSC 1985, c E-10, s 6.36 The  
Guidelines Order required all federal departments and agencies with “decision making  
responsibility” for any “proposal” involving an “initiative, undertaking or activity” that might have  
an environmental effect on an area of federal responsibility to initially screen the proposal to  
determine whether it may cause any adverse environmental effects.  
[85] The Supreme Court upheld the Guidelines Order as constitutional in Oldman River, and  
affirmed its mandatory nature. However, La Forest J linked federal environmental review of  
projects otherwise within exclusive provincial jurisdiction to the existence of a specific  
“affirmative regulatory duty” on the part of the federal government, in that case under the  
Navigable Waters Protection Act, RSC 1985, c N-22 [Navigable Waters Protection Act].37 He also  
determined that the federal assessment could only “affect matters that are ‘truly in relation to an  
institution or activity that is otherwise within [federal] legislative jurisdiction’”: Oldman River at  
72, citing Devine v Quebec (Attorney General), [1988] 2 SCR 790 at 808.38  
36  
Originally the Government Organization Act, 1979, SC 1978-79, c 13, s 14.  
37  
The term “responsibility” meant the federal government “must have an affirmative regulatory duty pursuant to an  
Act of Parliament which relates to the proposed initiative, undertaking or activity”: Oldman River at 47.  
38  
The Guidelines Order was said to be “supported by the particular head of federal power invoked in each instance”  
Page: 26  
2.  
Canadian Environmental Assessment Act, 1992  
[86] In 1992, Parliament enacted the Canadian Environmental Assessment Act, SC 1992, c 37  
[CEAA 1992]. It was not proclaimed in force until 1995 when the Law List Regulations, SOR/94-  
636 [Law List Regulations] issued under s 59(f) of CEAA 1992 came into force.39  
[87] CEAA 1992 was also “decision-based”, setting out four main categories of federal decisions  
under which a project would be subjected to an environmental assessment.40 Three related to the  
federal government’s exclusive jurisdiction.41 The fourth category was where a federal authority  
under a provision prescribed by the Law List Regulations issued a permit or licence, granted an  
approval or took any other action for the purpose of enabling the project to be carried out in whole  
or in part: s 5(1)(d).42 Only those intra-provincial projects in this category, in other words those  
requiring a federal permit, were compelled to undergo an environmental assessment under CEAA  
1992.  
[88] The extent of the assessment varied by project.43 CEAA 1992 contemplated four levels of  
assessment, each with increasing requirements: screenings, comprehensive studies, mediations and  
panel reviews. Screenings were the default unless the project was listed in the Comprehensive  
Study List Regulations, SOR/94-638 [Comprehensive Study List Regulations] or excluded.44  
[89] Until the Supreme Court’s decision in MiningWatch Canada v Canada (Fisheries and  
Oceans), 2010 SCC 2, [2010] 1 SCR 6 [Red Chris], a federal Minister or “responsible authority”  
under CEAA 1992 was considered to have the discretion to limit the “scope” of the assessment of  
a proposed project to the component thought to fall within federal jurisdiction as opposed to  
assessing the entire project as proposed by the proponent (e.g., assessing a dam close to a mine  
because it included “the necessary element of proximity that must exist between the impact assessment process and  
the subject matter of federal jurisdiction involved”: Oldman River at 72.  
39  
It was given royal assent June 1992 and proclaimed in force January 1995.  
40  
Section 5(1), subject to certain exclusions in s 7.  
41  
Where a “federal authority” (1) proposed the project; (2) provided financial assistance to a project; or (3) sold,  
leased or disposed of federal land: s 5(1)(a)-(c).  
42  
The Law List Regulations listed various federal statutory provisions whose application to a project, including intra-  
provincial projects, “triggered” the federal assessment.  
43  
CEAA 1992, ss 14, 18, 21, 40.  
44  
Screenings and comprehensive studies are examples of “self-assessment” under which the relevant authority that  
proposed to exercise a duty or function assessed the project themselves. Panel reviews were undertaken by independent  
expert bodies, often jointly with another jurisdiction.  
Page: 27  
rather than the entire mine).45 This was called “scoping to trigger”.46 Scoping to trigger had  
implications for which “track” a project would fall under. While a proposed project might be listed  
in the Comprehensive Study List Regulations and thereby require a “comprehensive study”,  
scoping the project to include only the portion purportedly falling within federal jurisdiction could  
take it out of that category such that only a “screening” would be required.  
[90] This “scoping to trigger” approach had been approved in Federal Court of Canada  
decisions: Manitoba’s Future Forest Alliance v Canada (Minister of Environment), [1999] FCJ  
No 903 (QL) (TD); Friends of the West Country Assn. v Canada (Minister of Fisheries and  
Oceans), [2000] 2 FC 263 (CA).47 These decisions preceded amendments made to CEAA 1992 in  
2003 which changed the requirements for projects in the “comprehensive study list” by explicitly  
providing for “public consultation” with respect to the proposed scope of the project.  
[91] Later, in Red Chris, despite Canada’s submission that nothing in the 2003 amendments to  
CEAA 1992 was intended to change the practice of scoping to trigger, the Supreme Court  
determined otherwise. It found that the public consultation must take place prior to the actual  
scoping decision and that the environmental assessment track was determined by the proposed  
project, not by the scoping decision of the federal authority: Red Chris at para 34.48 In other words,  
“scoping to trigger” could not be used to assess only part of a project.49  
[92] In 2010, following Red Chris, the federal government amended CEAA 1992 as part of an  
omnibus budget bill called the Jobs and Economic Growth Act, SC 2010, c 12 (Bill C-9) [Jobs and  
Economic Growth Act]. These amendments effectively overruled Red Chris.50 Bill C-9 restored  
“scoping to trigger” by giving the Minister of the Environment the power to scope projects down  
to their components. It also reduced public participation in the comprehensive study process.51  
45  
As explained by Marie-Ann Bowden & Martin Z. P. Olszynski in “Old Puzzle, New Pieces: Red Chris and  
Vanadium and the Future of Federal Environmental Assessment” (2010) Can Bar Rev 445 at 452 [Bowden &  
Olszynski]: “This practice involved separating a development proposal into a list of components and then only  
‘scoping-in’ those which required federal regulatory approval ....”  
46  
Bowden & Olszynski trace this history from CEAA 1992 to the Supreme Court’s decisions in Red Chris and Moses  
SCC.  
47  
It was also approved in Prairie Acid Rain Coalition v Canada (Minister of Fisheries and Oceans), 2006 FCA 31,  
[2006] 3 FCR 610.  
48  
The Supreme Court reasoned that while s 15 of CEAA 1992 granted the Minister discretion in terms of scope of the  
project, the presumed scope was as proposed and the Minister’s discretion was limited to increasing its scope.  
49  
The constitutionality of CEAA 1992 was not challenged on this point.  
50  
These 2010 amendments in Bill C-9 involving CEAA 1992 (see ss 2152-2161) included adding s 15.1 to CEAA  
1992 (see s 2155 of Jobs and Economic Growth Act), which stated as follows: “Despite section 15, the Minister may,  
if the conditions that the Minister establishes are met, determine that the scope of the project in relation to which an  
environmental assessment is to be conducted is limited to one or more components of that project” (emphasis added).  
51  
Specifically, s 2156 of Bill C-9 amended s 21 of CEAA 1992 to remove the “requirement for public consultation on  
Page: 28  
the proposed scoping of comprehensive studies”: see Robert B Gibson, “Three analyses of the amendments to the  
Canadian Environmental Assessment Act made through the Budget Implementation Act 2010” (2010) 51 CELR 184.  
Page: 29  
3.  
Canadian Environmental Assessment Act, 2012  
[93] In 2012, Parliament replaced CEAA 1992 with the Canadian Environmental Assessment  
Act, 2012, SC 2012, c 19, s 52 [CEAA 2012] which addressed a number of provincial concerns.52  
CEAA 2012 was never the subject of a constitutional challenge by any of the provinces.  
[94] First, Parliament attempted to minimize the identified problems arising from duplicate  
environmental impact assessments where an intra-provincial activity was involved, namely  
jurisdictional uncertainty, intergovernmental conflicts and duplication of resources. To address  
these concerns, Parliament provided in CEAA 2012 for a process of substitution and equivalency.  
Substitution allowed the federal government to delegate the environmental assessment to a  
province and base its decision on the findings of that provincial review. And equivalency allowed  
the federal government to treat the provincial assessment as “equivalent” to the federal process for  
purposes of determining whether the proposed intra-provincial activity would likely cause a  
significant adverse impact on matters within federal jurisdiction.  
[95] Second, as with the 2010 amendments to CEAA 1992, CEAA 2012 was designed to step  
past the need for environmental assessment of every proposed project in Canada over which the  
federal government had decision-making jurisdiction. CEAA 2012 substantially reduced the  
number of federal environmental assessments from those under CEAA 1992 by providing that only  
those projects designated by regulation or by the Minister of Environment were subject to federal  
environmental assessment: CEAA 2012, ss 2, 14, 84(a). It accordingly moved to a “project-based”  
regime from the prior “decision-based” regime under which assessments had been triggered by  
various kinds of federal decision-making.53 This explains why the numbers of projects assessed  
federally dropped dramatically from the number “reviewed” under CEAA 1992. Most projects  
under CEAA 1992 had proceeded by way of screening without a full comprehensive review. The  
CEAA 2012 reforms eliminated screenings. Further, projects designated by regulation under CEAA  
2012 did not lead to a federal environmental assessment where the federal government agreed that  
a project could be assessed provincially under the substitution and equivalency process.  
[96] Third, CEAA 2012 reduced the levels of assessment from four under CEAA 1992  
(screenings, comprehensive studies, mediation and panel reviews) to two (assessment by the  
“responsible authority” or a panel review). CEAA 2012 did not retain the “scoping to trigger”  
provisions from Bill C-9. Scoping had been a significant issue under CEAA 1992 because it  
affected whether a project would fall under the “comprehensive study” track or the “screening”  
track. But CEAA 2012 eliminated this distinction. Under CEAA 2012, “designated projects” listed  
52  
For an excellent summary of the differences between CEAA 1992 and CEAA 2012, see Brenda Heelan Powell,  
“Environmental Assessment & the Canadian Constitution: Substitution and Equivalency” (28 November 2014), online  
(pdf): Environmental Law Centre <https://elc.ab.ca/media/94543/EAConstitutionBriefFinal.pdf>.  
53  
Rod Northey, Guide to the Canadian Environmental Assessment Act, 2018 Edition (Toronto: LexisNexis Canada,  
2017) at 12 [Northey].  
Page: 30  
in the Regulations Designating Physical Activities, SOR/2012-147 [Regulations Designating  
Physical Activities] largely mirrored those projects which had previously fallen under the CEAA  
1992 Comprehensive Study List Regulations. Since those projects were subject to a comprehensive  
review under CEAA 2012 regardless, that ended the advantage of “scoping to trigger”.  
[97] Fourth, the scope and content of the environmental assessment of a designated project  
under CEAA 2012 was narrower than under CEAA 1992. The definition of “environmental effects”  
in CEAA 2012 was limited to effects on fish and fish habitat, aquatic species at risk, migratory  
birds, federal lands, extra-provincial effects and Aboriginal peoples.  
[98] Fifth, to minimize delay, CEAA 2012 prescribed legislated time limits for completion of  
federal environmental assessments.  
[99] Sixth, CEAA 2012 restricted public participation to “interested parties” only.54 CEAA 1992  
had required that a review panel hold hearings in a manner that offered “the public an opportunity  
to participate in the assessment”: s 34(b). CEAA 2012 required that a review panel hold hearings  
in a manner that offered “any interested party an opportunity to participate in the environmental  
assessment”: s 43(1)(c). The term “interested party” was defined in turn as a person who is  
“directly affected by the carrying out of the designated project” or “has relevant information or  
expertise”. This thereby reduced the extent of involvement by the general public in the assessment  
process: s 2(2).  
B.  
Overview of the Act and Regulations  
[100] The environmental impact assessment process federally has morphed from the procedural  
planning tool under the Guidelines Order upheld in Oldman River into a substantive regulatory  
regime under the IAA.  
1.  
Scope and Purposes of the Act  
[101] The Act applies to and compels (subject to a screening decision that no assessment is  
required) a comprehensive assessment and review of any activity anywhere in Canada designated  
in the Regulations (sometimes referred to as the “project list”) or by Ministerial order: Act, s 2.55  
The Governor in Council has broad discretion to decide which activities fall under the Regulations:  
Act, s 109(b). The Minister may also designate a physical activity not already prescribed by the  
Regulations if the Minister believes that the physical activity may cause adverse federal effects or  
if public concerns related to the effects warrant the designation: Act, s 9.  
54  
The 2010 amendments to CEAA 1992 under Bill C-9 had also limited public participation in the comprehensive  
study process.  
55  
The Governor in Council is authorized to make regulations “for the purpose of the definition designated project in  
section 2, designating a physical activity or class of physical activities and specifying which physical activity or class  
of physical activities may be designated by the Minister under paragraph 112(1)(a.2)”: Act, s 109(b).  
Page: 31  
[102] The Act is designed to assess proposed designated projects in their entirety rather than  
allowing for “scoping to trigger”. Unlike CEAA 2012, it has been expanded to assess the  
socioeconomic effects of proposed projects in addition to their biophysical effects.56  
[103] The breadth of the impact assessment mandated is illustrated not only by the scope of  
purported federal effects but also by at least 20 different factors that must be considered. These  
range from changes to environmental, health, social, or economic conditions, to “the extent to  
which the designated project contributes to sustainability”, to “the extent to which the effects of  
the designated project hinder or contribute to the Government of Canada’s ability to meet its  
environmental obligations and its commitments in respect of climate change”, to “the intersection  
of sex and gender with other identity factors” to “any other matter relevant to the impact  
assessment” that the Impact Assessment Agency of Canada (Agency) “requires to be taken into  
account”: Act, s 22(1).  
[104] The stated purposes of the Act include fostering sustainability, protecting components of  
the environment within federal jurisdiction, assessing the positive and adverse effects of a  
designated project, encouraging innovation, promoting cooperation with other jurisdictions,  
respecting the rights of Indigenous peoples and providing opportunity for public participation: Act,  
s 6(1).  
2.  
[105] These include the following:  
effects means, unless the context requires otherwise, changes to the  
Relevant Definitions Under the Act Relating to Effects  
environment or to health, social or economic conditions and the  
positive and negative consequences of these changes.  
effects within federal jurisdiction means, with respect to a physical  
activity or a designated project,  
(a)  
a change to the following components of the environment  
that are within the legislative authority of Parliament:  
i) fish and fish habitat, as defined in subsection 2(1)  
of the Fisheries Act,  
(ii) aquatic species, as defined in subsection 2(1) of  
the Species at Risk Act,  
56  
Rod Northey, Liane Langstaff & Anna Côté, A Guide to Canada’s Impact Assessment Act, 2020 Edition (Toronto:  
LexisNexis Canada, 2020) at 8 [Northey 2020].  
Page: 32  
(iii) migratory birds, as defined in subsection 2(1) of  
the Migratory Birds Convention Act, 1994, and  
(iv) any other component of the environment that is  
set out in Schedule 3;  
(b)  
(c)  
a change to the environment that would occur  
(i) on federal lands,  
(ii) in a province other than the one where the  
physical activity or the designated project is being  
carried out, or  
(iii) outside Canada;  
with respect to the Indigenous peoples of Canada, an impact  
occurring in Canada and resulting from any change to the  
environment on  
(i) physical and cultural heritage,  
(ii) the current use of lands and resources for  
traditional purposes, or  
(iii) any structure, site or thing that is of historical,  
archaeological, paleontological or architectural  
significance;  
(d)  
(e)  
any change occurring in Canada to the health, social or  
economic conditions of the Indigenous peoples of Canada;  
and  
any change to a health, social or economic matter that is  
within the legislative authority of Parliament that is set out  
in Schedule 3.57  
direct or incidental effects means effects that are directly linked or  
necessarily incidental to a federal authority’s exercise of a power or  
performance of a duty or function that would permit the carrying  
out, in whole or in part, of a physical activity or designated project,  
or to a federal authority’s provision of financial assistance to a  
person for the purpose of enabling that activity or project to be  
carried out, in whole or in part.  
57  
Schedule 3 of the Act lists “Components of the Environment” and “Health, Social, or Economic Matters.” Under  
s 7(2), the Governor in Council may, by order, add or remove a component or matter from Schedule 3. No components  
under s 7(1)(a)(iv) or matters under s 7(1)(e) are presently listed.  
Page: 33  
3.  
Exclusivity Principle Primary and Limited Jurisdiction  
[106] The types of activities in the project list relate to a variety of sectors. They include ones  
within the exclusive jurisdiction of either the federal or provincial governments. We recognize the  
limitations inherent in identifying an activity as being within the exclusive jurisdiction of one  
government level.58 As noted in Oldman River, the other government level may also have  
jurisdiction over some aspects of that activity. In particular, intra-provincial designated projects  
otherwise subject to exclusive provincial jurisdiction may have aspects subject to federal  
jurisdiction. For example, a project may require a permit under the Fisheries Act, RSC 1985, c F-  
14 [Fisheries Act].  
[107] Nevertheless, identifying which government level has the exclusive jurisdiction for the  
subject activity is not a trap but rather a necessary part of a division of powers analysis. The  
reference to “exclusive” jurisdiction is, after all, the written text of the Constitution itself. That text  
is the foundational basis for constitutional interpretation. 59 The exclusivity principle means  
something in constitutional law.60 It helps the court identify, and focus on, which government  
level has the “primary” jurisdiction for the subject activity as a whole and which has a “limited”  
jurisdiction vis à vis some aspects only of that activity or none at all.61 That necessarily includes  
zeroing in on the limitations inherent in the scope of the head of power of each government level.62  
[108] Put in the context of this case, provincial Legislatures have the exclusive jurisdiction over  
intra-provincial designated projects under several provincial heads of power. In other words, they  
have the primary jurisdiction over intra-provincial designated projects. Parliament’s jurisdiction is  
58  
As La Forest J explained in Oldman River at 68: “What is not particularly helpful in sorting out the respective  
levels of constitutional authority over a work such as the Oldman River dam, however, is the characterization of it as  
a ‘provincial project’ or an undertaking ‘primarily subject to provincial regulation’ as the appellant Alberta sought to  
do.”  
59  
“[C]onstitutional interpretation ... must first and foremost have reference to, and be constrained by, that text”:  
Quebec (Attorney General) v 9147-0732 Québec inc., 2020 SCC 32 at para 9. “The primacy of our written  
Constitution remains one of the fundamental tenets of our constitutional framework”: Quebec (Attorney General) v  
Canada (Attorney General), 2015 SCC 14 at para 18, [2015] 1 SCR 693.  
60  
For an excellent history of the various pre-Confederation resolutions leading up to the final draft of the British  
North America Act, 1867 (renamed the Constitution Act, 1867 on patriation in 1982) and the evolution and significance  
of the exclusivity principle, see Asher Honickman, “Watertight Compartments: Getting Back to the Constitutional  
Division of Powers” (2017) 55:1 Alta L Rev 225 at 227-231 [Honickman].  
61  
One author has characterized the two as “comprehensive” jurisdiction as opposed to “restricted” jurisdiction: Steven  
A. Kennett, “Federal Environmental Jurisdiction After Oldman” (1993) 38 McGill LJ 180 at 187-191 [Kennett].  
62  
As La Forest J explained in Oldman River at 67, “the exercise of legislative power, as it affects concerns relating  
to the environment, must, as with other concerns, be linked to the appropriate head of power, and since the nature of  
the various heads of power under the Constitution Act, 1867 differ, the extent to which environmental concerns may  
be taken into account in the exercise of a power may vary from one power to another.”  
Page: 34  
limited to the consequences of those projects on federal heads of power. And so too is Parliament’s  
regulatory authority over those projects.63  
4.  
Activities Included in the IAA  
[109] The following activities designated in the Regulations Schedule64 are matters primarily  
within exclusive federal jurisdiction:  
certain types of projects or activities located within a National Park or federally  
protected wildlife area, bird sanctuary or protected marine area (ss 1-11);  
specified matters involving the military or defence (ss 12-17);  
uranium mines or mills (ss 20-23);  
nuclear facilities (ss 26-29);  
offshore oil or gas facilities (ss 34-36);  
new international electrical transmission lines or inter-provincial power lines  
designated under the Canadian Energy Regulator Act (s 39);  
offshore oil and gas pipelines (s 40);  
interprovincial oil and gas pipelines (s 41);  
offshore wind power generating facilities (ss 44-45);  
aerodromes or runways (ss 46-47);  
international or interprovincial bridges or tunnels (s 48);  
canals or causeways in navigable waters (ss 49-50); and  
marine terminals (ss 52-53).  
63  
The Supreme Court recognized this distinction in Moses SCC at para 36: “There is no doubt that a vanadium mining  
project, considered in isolation, falls within provincial jurisdiction under s. 92A of the Constitution Act, 1867 over  
natural resources. There is also no doubt that ordinarily a mining project anywhere in Canada that puts at risk fish  
habitat could not proceed without a permit from the federal Fisheries Minister, which he or she could not issue except  
after compliance with the CEAA. The mining of non-renewable mineral resources aspect falls within provincial  
jurisdiction, but the fisheries aspect is federal” (emphasis added).  
64  
The Regulations include one Schedule.  
Page: 35  
[110] Importantly, however, designated projects also include intra-provincial activities otherwise  
within provincial jurisdiction such as mining, renewable energy, transportation and oil and gas.  
The following activities designated in the Regulations Schedule are matters primarily within  
exclusive provincial jurisdiction:  
certain activities with respect to new or existing coal, diamond, metal (other than  
uranium), rare earth element mines or stone quarry sand or gravel pits exceeding a  
specified daily production capacity (ss 18-19);  
certain activities with respect to existing or new oil sands mines with a bitumen  
production capacity of 10,000 m³/day or more (ss 24-25);  
the construction, operation, decommissioning, abandonment or expansion of a fossil  
fuel-fired power generating facility with a production capacity of 200 MW or more (ss  
30-31);  
the construction, operation, decommissioning, abandonment or expansion of an in situ  
oil sand extraction facility with a bitumen production capacity of 2,000 m³/day or more  
in a province that does not have provincial legislation limiting the amount of  
greenhouse gas emissions produced by oil sands sites in the province or where such  
limits have been reached (ss 32-33);  
the construction, operation, decommissioning and abandonment of new, or expansion  
of existing, oil refineries, facilities to liquify petroleum products from coal or natural  
gas, sour gas processing facilities, petroleum storage facilities, natural gas liquids  
storage facilities above specified production or storage capacities (ss 37-38);  
the construction, operation, decommissioning and abandonment of a new, and  
expansion of an existing, hydroelectric generating facility over a certain production  
capacity (ss 42-43);  
the construction, operation, decommissioning and abandonment of a new all-season  
public highway that requires a total of 75 km or more of new right of way (s 51);  
the construction, operation, decommissioning and abandonment of a new facility, or  
the expansion of an existing facility, for the treatment of hazardous waste that is within  
500 m from a natural water body (ss 56-57); and  
the construction, operation, decommissioning and abandonment of a new, or expansion  
of an existing, dam or dyke or water diversion structure that exceed certain limits (ss  
58-61).  
Page: 36  
5.  
Section 7 and Prohibitions  
[111] Section 7 of the Act prohibits the proponent of a designated project, and that would include  
all intra-provincial designated projects, from doing “any act or thing in connection with the  
carrying out of the designated project, in whole or in part, if that act or thing may cause” any of  
the listed effects. The listed effects track almost word for word the definition of “effects within  
federal jurisdiction”, that is the purported federal effects. Under s 7(3), a proponent of a designated  
project cannot do anything that may cause any of the effects listed in s 7(1) unless and until: (a)  
the Agency decides under s 16(1) that the project does not require an impact assessment; (b) the  
proponent complies with the conditions in the decision statement issued for the project following  
an impact assessment; or (c) the Agency permits the proponent to do something in aid of the impact  
assessment.  
[112] In particular, s 7 provides as follows:  
7 (1) Subject to subsection (3), the proponent of a designated project  
must not do any act or thing in connection with the carrying out of  
the designated project, in whole or in part, if that act or thing may  
cause any of the following effects:  
(a)  
a change to the following components of the environment  
that are within the legislative authority of Parliament:  
(i) fish and fish habitat, as defined in subsection 2(1)  
of the Fisheries Act,  
(ii) aquatic species, as defined in subsection 2(1) of  
the Species at Risk Act,  
(iii) migratory birds, as defined in subsection 2(1) of  
the Migratory Birds Convention Act, 1994, and  
(iv) any other component of the environment that is  
set out in Schedule 3;  
(b)  
(c)  
a change to the environment that would occur  
(i) on federal lands,  
(ii) in a province other than the one in which the act  
or thing is done, or  
(iii) outside Canada;  
with respect to the Indigenous peoples of Canada, an impact  
occurring in Canada and resulting from any change to the  
environment on  
Page: 37  
(i) physical and cultural heritage,  
(ii) the current use of lands and resources for  
traditional purposes, or  
(iii) any structure, site or thing that is of historical,  
archaeological, paleontological or architectural  
significance;  
(d)  
(e)  
any change occurring in Canada to the health, social or  
economic conditions of the Indigenous peoples of Canada;  
or  
any change to a health, social or economic matter within the  
legislative authority of Parliament that is set out in  
Schedule 3.  
(2) The Governor in Council may, by order, amend Schedule 3 to  
add or remove a component of the environment or a health, social  
or economic matter.  
(3) The proponent of a designated project may do an act or thing in  
connection with the carrying out of the designated project, in whole  
or in part, that may cause any of the effects described in subsection  
(1) if  
(a)  
the Agency makes a decision under subsection 16(1) that no  
impact assessment of the designated project is required and  
posts that decision on the Internet site;  
(b)  
the proponent complies with the conditions included in the  
decision statement that is issued to the proponent under  
section 65 with respect to that designated project and is not  
expired or revoked; or  
(c)  
the Agency permits the proponent to do that act or thing,  
subject to any conditions that it establishes, for the purpose  
of providing to the Agency the information or details that it  
requires in order to prepare for a possible impact assessment  
of that designated project or for the purpose of providing to  
the Agency or a review panel the information or studies that  
it considers necessary for it to conduct the impact assessment  
of that designated project.  
Page: 38  
(4) Despite paragraph (1)(d), the proponent of a designated project  
may do an act or thing in connection with the carrying out of the  
designated project, in whole or in part, that may cause a change  
described in that paragraph in relation to an Indigenous group,  
community or people that holds rights recognized and affirmed by  
section 35 of the Constitution Act, 1982 if the change is not adverse  
and the council, government or other entity that is authorized to act  
on behalf of the Indigenous group, community or people and the  
proponent have agreed that the act or thing may be done.  
[113] Contravening s 7 is an offence under the Act, punishable by substantial fines under s 144.  
6. Section 8 and Prohibitions  
[114] Under the Act, Parliament has also regulated what it has defined as “direct or incidental  
effects” and what it characterizes as “adverse direct or incidental effects”. Direct or incidental  
effects include effects that are directly linked or necessarily incidental to a federal authority’s grant  
of a federal permit or approval that a designated project requires under other valid federal  
legislation to proceed: Act, s 2. Simply, this definition captures those designated projects requiring  
a federal permit to proceed. Various sections of the Act refer to “adverse direct or incidental  
effects” and “adverse effects within federal jurisdiction” together.65  
[115] Section 8 of the Act prohibits a federal authority from issuing a federal permit for a  
designated project unless a positive public interest determination has been made by the federal  
executive or unless no impact assessment is required:  
A federal authority must not exercise any power or perform any duty  
or function conferred on it under any Act of Parliament other than  
this Act that could permit a designated project to be carried out in  
whole or in part and must not provide financial assistance to any  
person for the purpose of enabling that designated project to be  
carried out, in whole or in part, unless  
(a) the Agency makes a decision under subsection  
16(1) that no impact assessment of the designated  
project is required and posts that decision on the  
Internet site; or  
65  
Examples: “the effects within federal jurisdiction or the direct or incidental effects” or “the adverse effects within  
federal jurisdiction and the adverse direct or incidental effects” or “the adverse effects within federal jurisdiction or  
the adverse direct or incidental effects” or “those that are adverse effects within federal jurisdiction and those that are  
direct or incidental effects” or “which ... are adverse effects within federal jurisdiction and which are direct or  
incidental effects”: Act, ss 6(d), 9(1), 16(2)(b), 28(3), 33(2), 36(2)(a), 51(1)(d)(ii), 59(2), 60(1)(a), 61(1), 62, 63(b)  
and 106(2)(c)).  
Page: 39  
(b) the decision statement with respect to the  
designated project that is issued to the proponent of  
the designated project under section 65 sets out that  
the effects that are indicated in the report with respect  
to the impact assessment of that project are in the  
public interest.  
7.  
Phases of Impact Assessment Process  
[116] There are three main phases to the impact assessment process.  
[117] First, there is the planning phase: Act, ss 10-18. A proponent of a designated project  
provides the Agency with a description of the project that must include information prescribed by  
regulation. An initial project description is provided based on Schedule 1 of the Information and  
Management of Time Limits Regulations, SOR/2019-283 [Information Regulations]: Act, s 10(1).  
The Agency then consults with a number of parties, on the basis of which it provides the proponent  
with a summary of issues: Act, s 14(1). The proponent must then provide the Agency with a notice  
setting out a response to this summary of issues and a detailed project description based on  
Schedule 2 of the Information Regulations: Act, s 15(1). If the Agency decides a designated project  
requires an impact assessment, it issues a notice of commencement outlining the information and  
studies needed to conduct the assessment and documents set out in s 5 of the Information  
Regulations: Act, s 16; s 18(1).  
[118] Second, there is the impact assessment phase. This begins with the proponent collecting  
the requested information and completing the required studies which it provides to the Agency in  
a document called an “impact statement”: Act, s 19(1).66 An assessment of the designated project  
is then carried out, either by the Agency or, in cases where the Minister is of the view it is in the  
public interest, a review panel. The potential effects of a designated project are assessed, after  
which a report (Report) is prepared by the Agency or review panel detailing the effects of the  
project: Act, ss 25, 51(1)(d)(i)-(ii). The Report must set out the likely effects of the designated  
project, indicate the adverse federal effects and specify the extent to which those effects are  
significant.67  
[119] Notably, the Report must take into account the factors set out in s 22(1) (sometimes referred  
to as the “s 22 mandatory factors”), namely:  
66  
Government of Canada, Impact Assessment Agency of Canada, “Phase 2: Impact Statement”, online:  
<https://www.canada.ca/en/impact-assessment-agency/services/policy-guidance/impact-assessment-process-overvie  
w/phase2.html>.  
67  
The Report must also explain how any provided Indigenous knowledge was considered, summarize any public  
comments and recommend mitigation measures and follow-up programs: Act, ss 28(3)-(3.2), 51(1)(d)(ii.1)-(iv).  
Page: 40  
(a) the changes to the environment or to health, social or economic  
conditions and the positive and negative consequences of these  
changes that are likely to be caused by the carrying out of the  
designated project, including  
(i) the effects of malfunctions or accidents that may occur in  
connection with the designated project,  
(ii) any cumulative effects that are likely to result from the  
designated project in combination with other physical  
activities that have been or will be carried out, and  
(iii) the result of any interaction between those effects;  
(b) mitigation measures that are technically and economically  
feasible and that would mitigate any adverse effects of the  
designated project;  
(c) the impact that the designated project may have on any  
Indigenous group and any adverse impact that the designated project  
may have on the rights of the Indigenous peoples of Canada  
recognized and affirmed by section 35 of the Constitution Act, 1982;  
(d) the purpose of and need for the designated project;  
(e) alternative means of carrying out the designated project that are  
technically and economically feasible, including through the use of  
best available technologies, and the effects of those means;  
(f) any alternatives to the designated project that are technically and  
economically feasible and are directly related to the designated  
project;  
(g) Indigenous knowledge provided with respect to the designated  
project;  
(h) the extent to which the designated project contributes to  
sustainability;  
(i) the extent to which the effects of the designated project hinder or  
contribute to the Government of Canada’s ability to meet its  
environmental obligations and its commitments in respect of climate  
change;  
Page: 41  
(j) any change to the designated project that may be caused by the  
environment;  
(k) the requirements of the follow-up program in respect of the  
designated project;  
(l) considerations related to Indigenous cultures raised with respect  
to the designated project;  
(m) community knowledge provided with respect to the designated  
project;  
(n) comments received from the public;  
(o) comments from a jurisdiction that are received in the course of  
consultations conducted under section 21;  
(p) any relevant assessment referred to in section 92, 93 or 95;  
(q) any assessment of the effects of the designated project that is  
conducted by or on behalf of an Indigenous governing body and that  
is provided with respect to the designated project;  
(r) any study or plan that is conducted or prepared by a jurisdiction  
or an Indigenous governing body not referred to in paragraph (f)  
or (g) of the definition jurisdiction in section 2 that is in respect  
of a region related to the designated project and that has been  
provided with respect to the project;  
(s) the intersection of sex and gender with other identity factors; and  
(t) any other matter relevant to the impact assessment that the  
Agency requires to be taken into account. [Emphasis added]  
[120] Third, there is the decision phase: Act, ss 60-66. The Minister or Governor in Council is  
required to make a public interest determination with respect to the designated project which must  
be based on both the Report (which must take into account the s 22 mandatory factors) and the  
factors set out in s 63 (sometimes referred to as the “s 63 mandatory factors”; the “s 22 mandatory  
factors” and “s 63 mandatory factors” being sometimes collectively referred to as the “mandatory  
factors”). If the public interest determination is positive, the Minister or Governor in Council must  
also determine what conditions will be imposed: Act, ss 64(1)-(2). The Minister must then issue a  
“decision statement” to the proponent informing the proponent of the public interest determination  
Page: 42  
made by either the Minister or Governor in Council and the reasons for it and, if applicable, any  
conditions that must be complied with by the proponent: Act, s 65(1).  
[121] If the public interest determination is not positive, that is negative, the proponent continues  
to be prohibited from proceeding with the designated project if it may cause any of the purported  
federal effects: Act, s 7(3). This effectively prohibits the proponent from proceeding since the  
negative public interest determination constitutes a finding by the federal executive that the  
designated project may cause such purported federal effects. Further, without a positive public  
interest determination, the federal executive has no obligation to set out any conditions to allow  
the proponent to proceed regardless: Act, s 64(1), s 64(2). In addition, as noted, if the proponent  
requires a federal permit to proceed, no federal authority is permitted to issue that federal permit  
without a positive public interest determination: Act, s 8(b). Other enforcement measures are also  
available to prevent the proponent from proceeding: Act, ss 120-140.  
[122] In the real world, these provisions reduce to this: unless and until the federal executive  
determines that an intra-provincial designated project is in the public interest, the proponent of  
that project cannot proceed with it, full stop.  
VIII. Overview of Environmental Assessment Legislation Provincially  
A.  
1.  
Alberta  
Overview of Environmental Impact Assessment Legislation in Alberta  
[123] For decades, Alberta has played an international leadership role in developing oil and gas  
resources in an environmentally responsible manner. Alberta was one of the first jurisdictions in  
Canada to implement an environmental impact assessment process. It first enacted legislation for  
this purpose in 1973, more than a decade before federal environmental assessment legislation.  
[124] The Environmental Protection and Enhancement Act, RSA 2000, c E-12 [EPEA] currently  
governs provincial environmental assessments in Alberta. The process is administered by Alberta  
Environment and Parks or, in cases of upstream oil and gas or coal development, the Alberta  
Energy Regulator.68  
[125] The Environmental Assessment (Mandatory and Exempted Activities) Regulation, Alta Reg  
111/1993 [Mandatory and Exempted Activities Regulation] passed under the EPEA classifies  
projects as mandatory or exempted for purposes of conducting a provincial environmental  
assessment. Schedule 1 of the Mandatory and Exempted Activities Regulation lists mandatory  
68  
The Alberta Energy Regulator was created by s 3 of the Responsible Energy Development Act, SA 2012, c R-17.3,  
which also dissolved the predecessor Energy Resources Conservation Board (s 81).  
Page: 43  
projects.69 The full list, which is extensive and runs from (a) to (aa), includes projects such as the  
construction, operation, or reclamation of:  
a pulp, paper, newsprint or recycled fibre mill with a capacity of more than 100  
tonnes per day;  
a quarry producing more than 45,000 tonnes per year;  
a dam greater than 15 metres in height;  
a surface coal mine producing more than 45,000 tonnes per year;  
an oil sands mine;  
a commercial oil sands, heavy oil extraction, upgrading or processing plant  
producing more than 2000 cubic metres of crude bitumen or its derivatives per  
day;  
a thermal electrical power generating plant that uses non-gaseous fuel and has  
a capacity of 100 megawatts or greater;  
a hydroelectric power generating plant with a capacity of 100 megawatts or  
greater;  
an oil refinery;  
a sour gas processing plant that emits more than 2.8 tonnes of sulphur per day;  
a pesticide manufacturing plant.  
[126] In addition, the Director may also require an environmental assessment for any project the  
Director decides warrants further consideration: EPEA, s 43.70 In deciding whether to subject a  
project to an environmental assessment, the Director must consider factors such as the size,  
location, nature and complexity of the project as well as public concerns: EPEA, s 44(3).71  
2.  
Operational Aspects of Alberta’s Environmental Impact Assessment Regime  
[127] The purposes of the EPEA focus on environmental protection and sustainable development,  
integrating environmental and economic decision-making in the earliest planning stages,  
predicting the environmental, social, economic and cultural consequences of a proposed activity  
and engaging key stakeholders and the general public: EPEA, s 40.  
[128] The environmental assessment process results in the production of an environmental  
impact assessment report (EIA Report). Under s 49 of the EPEA, the EIA Report must include  
information such as:  
69  
Schedule 2 sets out exempted projects.  
70  
The term “Director” is defined in s 43 of the EPEA, as well as ss 44-56, as being “the Director who is designated  
for the purposes of those sections”.  
71  
Alberta provided examples of two projects that have been reviewed in accordance with the Director’s exercise of  
discretion: Alberta Sulphur Terminals Ltd.’s sulphur forming and shipping facility near Bruderheim, Alberta and the  
expansion of the Castle Mountain Resort near Pincher Creek, Alberta (Affidavit of Corinne Kristensen at paras 25-  
26: Alberta Record at A6-7).  
Page: 44  
a description of the activity;  
an analysis of the need for the activity;  
a site selection analysis;  
a description of potential positive and negative environmental, social, economic  
and cultural impacts of the proposed activity, including cumulative, regional,  
temporal and spatial considerations and the significance of these effects;  
plans to mitigate any negative impacts;  
alternatives to the proposed activity;  
plans to monitor environmental impacts;  
a program of public consultation; and  
any other necessary information.  
[129] Federal stakeholders can also contribute to provincial impact assessments under the EPEA.  
Federal agencies, including the Agency, Environment and Climate Change Canada and Fisheries  
and Oceans Canada, can be invited to participate in the review of an EIA Report.72  
[130] Once an EIA Report is complete, it is referred to the appropriate regulatory decision-maker  
to determine if the activity is in the public interest and whether regulatory approvals should be  
granted.  
3.  
In Situ Oil Sands Projects  
[131] Alberta has a highly developed and comprehensive legislative regime to address all aspects  
of development of its oil and gas resources, including environmental consequences. In situ  
recovery is used where the oil sands from which bitumen is to be extracted are buried too deep to  
mine, that is more than 75 metres below the ground. Wells are drilled to extract the bitumen.73  
[132] In situ operations are subject to a number of specific Directives from the Alberta Energy  
Regulator.74 It currently regulates 85 active thermal/enhanced in situ projects and over 215 active  
72  
Affidavit of Corinne Kristensen at para 38: Alberta Record, A11.  
73  
This process is explained in some detail in Alberta Energy Regulator, “In Situ Recovery”, online:  
<www.aer.ca/providing-information/by-topic/oil-sands/in-situ-recovery>. Where the bitumen is too viscous to flow  
to the well on its own, heat must be added or fluids injected to reduce its viscosity. Most in situ bitumen recovery uses  
steam to heat the bitumen in the reservoir. This is known as thermal in situ recovery. There are two main thermal in  
situ oil sands technologies: steam-assisted gravity drainage and cyclic steam stimulation. While they are the most  
widely used, other options exist: Toe-to-Heel Air Injection, Vapour Extraction Process and an Electro-Thermal  
Dynamic  
Stripping  
Process:  
see  
Energy  
Education,  
online:  
<https://energyeducation.ca/encyclopedia/In_situ_oil_sands_mining>.  
74  
In situ operations are required to recycle as much water as possible. Typically 90% of the water is recycled: Alberta  
Regulator, “In Situ Recovery”, online:  
<www.aer.ca/providing-information/by-topic/oil-sands/in-situ-recovery>.  
Energy  
Page: 45  
primary recovery in situ projects. 75 A proponent must secure the necessary environmental  
approvals before proceeding. Assessments are “mandatory” under the Mandatory and Exempted  
Activities Regulation if the in situ project “will produce more than 12,600 barrels (2000 m³) of  
bitumen per day”.76 A proponent seeking to develop an in situ project in the oil sands must also  
obtain a “scheme approval” under the Oil Sands Conservation Act, RSA 2000, c O-7. Other  
approvals might include approvals under the Oil and Gas Conservation Act, RSA 2000, c O-6 (for  
well licences), Pipeline Act, RSA 2000, c P-15 (for pipeline licences), Water Act, RSA 2000, c W-  
3 (to divert water and/or cause impacts to water bodies) and the Public Lands Act, RSA 2000, c P-  
40 (for access to and use of public lands).77  
[133] In situ oil recovery is akin to extracting oil through individual oil wells drilled into the  
ground.78 Thus, under prior federal environmental legislation, in situ oil sands projects typically  
did not require a federal environmental impact assessment.79 The exception was if the project  
proponent required a federal permit under federal legislation such as the Fisheries Act.80  
[134] To place the addition of in situ projects to the project list in context, mining versus in situ  
methods of recovery today in Alberta are currently roughly equal. Mining accounts for 47% of  
current production and in situ, 53%. However, in situ is expected to outpace mining in the future  
to the point where mining will make up 19% of production and in situ 81%.81  
4.  
Canada-Alberta Bilateral Agreement on Environmental Assessment  
75  
76  
Affidavit of Camille Almeida at para 12: Alberta Record, B4.  
Affidavit of Camille Almeida at paras 27, 31: Alberta Record, B7-8. Exhibit “D” (Alberta Record, A39-47) of the  
Affidavit of Corinne Kristensen (Alberta Record, A1-23) lists completed environmental assessments in Alberta. Of  
the 67 in situ projects on the list, 66 were subject to a “mandatory” assessment and one to a “discretionary” assessment  
which took place.  
77  
Affidavit of Camille Almeida at paras 18-26: Alberta Record, B5-7.  
78  
As explained in the Affidavit of Paul Tsounis at para 11: “In-situ oil sands production requires infrastructure and  
surface footprints that are similar to conventional oil and gas production and does not involve or require surface  
mining” (Alberta Record, C4).  
79  
Affidavit of Corinne Kristensen at para 88: Alberta Record, A22.  
80  
Affidavit of Camille Almeida at para 29: Alberta Record, B7.  
81  
Affidavit of Paul Tsounis at para 11, which notes that it is “estimated that approximately 81% of Alberta’s oil sands  
resource will be developed using in situ methods rather than mining methods” (Alberta Record at C4). This figure is  
derived from Natural Resources Canada data attached as Exhibit “B” to his Affidavit (Alberta Record, C14-15).  
Page: 46  
[135] The optional process outlined in the Bilateral Agreement has previously been used for  
projects subject to an assessment under the EPEA and in respect of which federal jurisdiction has  
been triggered.82  
B.  
1.  
Ontario  
Overview of Environmental Assessment Impact Legislation in Ontario  
[136] The Environmental Assessment Act, RSO 1990, c E.18 [ONEAA] sets out the processes to  
evaluate the environmental impact of intra-provincial enterprises, activities, plans, programs or  
proposals. The purpose of the ONEAA is “the betterment of the people of the whole or any part of  
Ontario by providing for the protection, conservation and wise management in Ontario of the  
environment”: ONEAA, s 2. “Environment” is defined broadly to include the natural, social,  
economic, cultural and built environments: ONEAA, s 1(1).  
[137] The ONEAA applies to: (a) enterprises, activities, plans, programs, or proposals of the  
public sector, such as provincial ministries, municipalities, or public bodies; and (b) enterprises,  
activities, plans, programs, or proposals of the private sector designated by regulations or voluntary  
agreement: ONEAA, ss 3, 3.0.1.  
[138] With the approval of the Lieutenant Governor in Council, the Minister may exempt an  
undertaking from the ONEAA or amend, impose or revoke conditions imposed on an undertaking  
under the ONEAA if the Minister considers it in the public interest to do so: ONEAA, s 3.2(1). The  
Minister may also vary or dispense with requirements under the ONEAA if another jurisdiction  
already imposes restrictions on the undertaking, and the Minister considers those requirements to  
be equivalent to what is required in Ontario under a harmonization agreement: ONEAA, s 3.1. For  
example, Ontario and Canada may coordinate their respective environmental assessments under a  
harmonization agreement.  
2.  
Operational Aspects of Ontario’s Environmental Impact Assessment Regime  
[139] An undertaking subject to the ONEAA will undergo either the streamlined environmental  
assessment process or the individual environmental assessment process. The streamlined process  
usually applies to undertakings carried out routinely with predictable environmental effects that  
can be readily managed. These are set out in Class Environmental Assessment approvals,  
exempting regulations and Minister’s declaration orders: ONEAA, s 16, 39(f), 3.2. Some  
undertakings within a routine class may warrant additional study and consideration in which case  
the ONEAA authorizes the Minister to impose additional conditions or require the undertaking to  
go through the individual process instead: ONEAA, s 16(3).  
82  
Affidavit of Corinne Kristensen at para 89: Alberta Record, A22.  
Page: 47  
[140] The individual assessment process usually applies to large-scale complex undertakings  
where there is the potential for significant environmental impacts. This process is intended to  
assess reasonable alternatives or means of implementing the undertaking, taking into account the  
environmental advantages and disadvantages. The individual process involves:  
Preparation of Terms of Reference: Terms of reference setting out the  
framework for the planning and decision-making process must be prepared and  
reviewed. At this stage, the proponent also gives public notice of the proposed  
terms of reference: ONEAA, ss 6(1)-(3.6).  
Approval of Terms of Reference: The Minister decides whether to approve the  
terms of reference or ask for amendments: ONEAA, ss 6(4)-(6).  
Environmental Assessment: If approved, the environmental assessment will be  
prepared and submitted in accordance with the approved terms of reference.  
The assessment will contain a description of the purpose and rationale for the  
undertaking, a description of the environmental impacts, a description of the  
actions that may be reasonably necessary to mitigate or prevent environmental  
impacts, an evaluation of any alternative methods of carrying out the  
undertaking and a description of any consultation that has taken place: ONEAA,  
ss 6.1-6.2.  
Review of Environmental Assessment: The environmental assessment will be  
reviewed by the Director appointed under the ONEAA. There will be an  
opportunity for public comment on the undertaking, the environmental  
assessment and the Director’s review: ONEAA, ss 7, 7.2. The Director will give  
the proponent an opportunity to remedy any deficiencies and may reject the  
environmental assessment if not satisfied that the deficiencies have been  
remedied: ONEAA, s 7(6). The Minister may also decide whether to refer all or  
part of the decision to the Environmental Review Tribunal: ONEAA, ss 9.1-9.3.  
The Minister (or Tribunal) then decides whether to approve the undertaking  
(subject to the approval of the Lieutenant Governor in Council), and must take  
into account a list of factors set out in the ONEAA including the purpose of the  
ONEAA and any public comments: ONEAA, ss 9(1)-(2), 9.1(2)-(3).  
C.  
1.  
Saskatchewan  
Overview of Environmental Assessment Legislation in Saskatchewan  
[141] The Environmental Assessment Act, SS 1979-80, c E-10.1 [SKEAA] sets out the assessment  
processes for intra-provincial developments that impact the environment to obtain approval from  
the Saskatchewan Ministry of Environment. “Environment” is defined broadly to include the  
natural, social, economic and cultural environments: SKEAA, s 2(e).  
Page: 48  
2.  
Operational Aspects of Saskatchewan’s Environmental Impact Assessment Regime  
[142] The assessment process first involves a screening step to determine whether the project  
meets the definition of a “development”. The proponent must apply for a determination whether  
its project is a “development” and provide the Minister with all information reasonably required  
to make that determination: SKEAA, s 7.2. Under s 2(d), “development” is defined as:  
any project, operation or activity or any alteration or expansion of  
any project, operation or activity which is likely to:  
(i) have an effect on any unique, rare or endangered feature of the  
environment;  
(ii) substantially utilize any provincial resource and in so doing  
pre-empt the use, or potential use, of that resource for any other  
purpose;  
(iii) cause the emission of any pollutants or create by-products,  
residual or waste products which require handling and disposal in a  
manner that is not regulated by any other Act or regulation;  
(iv) cause widespread public concern because of potential  
environmental changes;  
(v) involve a new technology that is concerned with resource  
utilization and that may induce significant environmental change; or  
(vi) have a significant impact on the environment or necessitate a  
further development which is likely to have a significant impact on  
the environment.  
[143] If the project does not fall within the definition of “development”, the proponent will  
receive a Ministerial determination that an environmental impact assessment is not necessary:  
SKEAA, s 7.6. If the project does meet the definition of “development”, the proponent must then  
obtain Ministerial approval in order to proceed with the development: SKEAA, s 8(1).  
[144] To obtain Ministerial approval, the proponent must submit an environmental impact  
assessment of the development and an impact statement relating to the development: SKEAA,  
s 9(1). The Minister will review the statement and impose any conditions considered appropriate  
and the statement will be made available for public inspection: SKEAA, ss 11(1)-(2). The Minister  
may appoint persons to conduct additional inquiries at any point prior to making their decision:  
Page: 49  
SKEAA, s 14. The Minister will then either give approval to proceed with or without terms and  
conditions or refuse to approve the development: SKEAA, s 15(1).  
IX. Foundational Constitutional Principles  
A.  
Federalism  
[145] Federalism is a foundational principle of Canada’s constitutional architecture and defining  
characteristic of Canada as a nation.83 It finds its “primary textual expression” in the division of  
powers set out mainly in ss 91 and 92 of the Constitution Act, 1867: Secession Reference at para  
47; Reference re Genetic Non-Discrimination Act, 2020 SCC 17 at para 20 [Genetic Non-  
Discrimination]. Under this division, “broad powers were conferred on the provinces to ensure  
diversity, while at the same time reserving to the federal government powers better exercised in  
relation to the country as a whole to provide for Canada’s unity”: References re Greenhouse Gas  
Pollution Pricing Act, 2021 SCC 11 at para 49 [References re Greenhouse Gas Pollution Pricing  
Act SCC].  
[146] This reflects the balance the Fathers of Confederation chose between diversity and unity;  
reconciling the two was achieved by granting significant powers to provincial governments:  
Secession Reference at para 43. Thus, federalism recognizes the “autonomy of provincial  
governments to develop their societies within their respective spheres of jurisdiction”: Secession  
Reference at para 58, cited in R v Comeau, 2018 SCC 15 at para 78, [2018] 1 SCR 342.  
[147] Federalism has distinct advantages. It enhances efficiency by decentralizing power. And in  
doing so, it enhances accountability to the people that governments serve. Moreover, since neither  
level of government has unlimited power, each serves as a check on the other. In addition,  
federalism encourages opportunities for innovation and new ways of dealing with old problems  
especially where provinces or regions face unique challenges. This permits new solutions to be  
tested locally or regionally first, thereby avoiding the problems invariably inherent in a one size  
fits all solution for challenges faced by all provinces.84 Additionally, by its nature, our federal  
structure creates competitive incentives in the marketplace.85  
[148] The Constitution Act, 1867 grants Parliament the authority to enact laws for the “Peace,  
Order, and good Government of Canada” and in relation to roughly 30 classes of laws described  
in ss 91, 92(10), 92A(3), 93(4), 94, 94A, 95, 101, 132 and other parts of the Constitution Act, 1867.  
It grants the provincial Legislatures the authority to enact laws as described in ss 92, 92A, 93, 94A  
83  
Secession Reference at para 32; References re Greenhouse Gas Pollution Pricing Act at para 48. The objectives  
of federalism are to “reconcile unity with diversity, promote democratic participation by reserving meaningful powers  
to the local or regional level and to foster co-operation among governments and legislatures for the common good”:  
Canadian Western Bank at para 22.  
84  
Hogg at §5:8.  
85  
The Constitution specifically contemplates people seeking opportunities: see s 6 of the Charter.  
Page: 50  
and 95. A law enacted by Parliament or a provincial Legislature is valid only if the maker had the  
power to pass it. Neither has unlimited legislative authority.  
B.  
Subsidiarity  
[149] Subsidiarity has been recognized as an underlying principle of federalism: see Dwight  
Newman, “Changing Division of Powers Doctrine and the Emergent Principle of Subsidiarity”  
(2011) 74:1 Sask L Rev 21 at 26-28. Subsidiarity is the principle that “law-making and  
implementation are often best achieved at a level of government that is not only effective, but also  
closest to the citizens affected and thus most responsive to their needs, to local distinctiveness, and  
to population diversity”: 114957 Canada Ltée (Spraytech, Société d’arrosage) v Hudson (Town),  
2001 SCC 40 at para 3, [2001] 2 SCR 241. The division of powers generally adheres to this  
principle: Peter Hogg & Wade Wright, Constitutional Law of Canada, 5th ed (Toronto: Carswell,  
2007) (loose-leaf updated 2021) at §5:7 [Hogg].86 It accomplishes this by “distributing power to  
the government thought to be most suited to achieving the particular societal objective”: Secession  
Reference at para 58.87  
[150] The principle of subsidiarity also reflects the political realities of our geographically large  
country whose population is concentrated in certain provinces. Subsidiarity is a counterbalance to  
centralism and majoritarianism.88 Those provinces with the largest populations and most Members  
of Parliament will often have the most substantial influence on the policies of the federal  
government when, as typically happens, they are responsible for the election of that government.  
As a result, policies chosen by the federal government are often dictated by the wishes of the  
majority, especially the majority in those areas responsible for their election. Therefore, what is  
important to an individual province and its citizens may not be as important to the federal  
government.  
[151] The protection for individual provinces, all of whom may find themselves on the outside  
looking in at one time or another, lies in the division of powers. This helps ensure that a province,  
no matter how small or large, is able to defend itself against those asserting that the national good  
trumps that province’s interests.89 In recognizing the benefit of the proximity of government to  
86  
In Reference re Assisted Human Reproduction Act, 2010 SCC 61 at para 273, [2010] 3 SCR 457 [AHRA  
Reference], LeBel and Deschamps JJ suggested the principle of subsidiarity could act as an “interpretive principle  
that derives, as this Court has held, from the structure of Canadian federalism and that serves as a basis for connecting  
provisions with an exclusive legislative power”.  
87  
See also Hugo Cyr, “Autonomy, Subsidiarity, Solidarity: Foundations of Cooperative Federalism” (2014) 23:4  
Const F 20 at 26.  
88  
As stated at para 66 of the Secession Reference, “[n]o one majority is more or less ‘legitimate’ than the others as  
an expression of democratic opinion, although, of course, the consequences will vary with the subject matter. A federal  
system of government enables different provinces to pursue policies responsive to the particular concerns and interests  
of people in that province.”  
89  
Former Alberta Premier Peter Lougheed captured these concerns well: “The only way that there can be a fair deal  
Page: 51  
the people that government serves, subsidiarity invigorates confidence in the electors that their  
voice is heard and valued. As an interpretive principle, therefore, subsidiarity militates strongly  
against erosion of provincial powers.  
C.  
Conclusion  
[152] Thus, in determining whether the IAA is unconstitutional, federalism, including  
subsidiarity, weighs heavily in the analysis. Where a doubt arises about classification of a  
challenged law, the subsidiarity principle, an essential aspect of federalism, favours provincial  
jurisdiction.90  
X. Indigenous Peoples and the Division of Federal/Provincial Powers  
A.  
Section 91(24) of the Constitution Act, 1867  
[153] Canada has exclusive jurisdiction to legislate in relation to “Indians, and Lands reserved  
for the Indians” under s 91(24) of the Constitution Act, 1867. The main statutory form in which  
Parliament has exercised its s 91(24) jurisdiction is the Indian Act, RSC 1985, c I-5 [Indian Act].91  
[154] Canadian courts have long rejected the idea that Indigenous peoples and “Lands reserved  
for the Indians” are federal “enclaves” from which provincial laws are excluded. “First Nations  
are not enclaves of federal power in a sea of provincial jurisdiction”: Kitkatla Band v British  
Columbia (Minister of Small Business, Tourism and Culture), 2002 SCC 31 at para 66, [2002]  
2 SCR 146 [Kitkatla]; see also Paul v British Columbia (Forest Appeals Commission), 2003 SCC  
55 at para 36, [2003] 2 SCR 585 [Paul]; Cardinal v Attorney General of Alberta, [1974] SCR 695  
at 702-703 [Cardinal]. Therefore, while only Parliament can validly enact legislation in relation  
to “Indians, and Lands reserved for the Indians”, provincial legislation can affect and thus apply  
to these subjects “so long as the law is in relation to a matter coming within a provincial head of  
power”: Hogg at §28:7.  
[155] Accordingly, provincial laws of general application usually apply to the Indigenous  
peoples of Canada of their own force, that is proprio vigore: Cardinal at 702-703; NIL/TU,O  
Child and Family Services Society v B.C. Government and Service Employees’ Union, 2010  
for the citizens of the outlying parts of Canada is for the elected provincial governments of these parts to be sufficiently  
strong to offset the political power in the House of Commons of the populated centres. That strength can only flow  
from the provinces’ jurisdiction over the management of their own economic destinies and the development of the  
natural resources owned by the provinces”: Meekison & Romanow at 11.  
90  
That was the view of LeBel and Deschamps JJ in AHRA Reference in concluding at para 273 that subsidiarity  
“would favour connecting the rules in question with the provinces’ jurisdiction over local matters, not with the criminal  
law power”.  
91  
“Indians” include the Inuit, Métis, and non-status Indians (Daniels v Canada (Indian Affairs and Northern  
Development), 2016 SCC 12, [2016] 1 SCR 99 [Daniels]), though Parliament has not included these groups in the  
Indian Act.  
Page: 52  
SCC 45 at para 71, [2010] 2 SCR 696 [NIL/TU,O]. Those laws are constitutionally valid even if  
they have incidental effects on “Indians, and Lands reserved for the Indians”: Rempel Bros.  
Concrete Ltd. v Chilliwack (District of), 1994 CanLII 1728 at para 24, 5 WWR 122 (BCCA).92  
[156] The one exception involves the doctrine of interjurisdictional immunity. Under this  
doctrine, a valid provincial law of general application which impairs the “core” of s 91(24) cannot  
apply of its own force.93 The “core” of s 91(24) refers to matters going to “Indianness”: Hogg at  
§28:9.94 Such matters have been found to include, for example, Indian status (Natural Parents v  
Superintendent of Child Welfare, [1976] 2 SCR 751); “possession of lands on an Indian reserve”  
(Derrickson v Derrickson, [1986] 1 SCR 285 at 296); and occupancy of a family residence on a  
reserve (Paul v Paul, [1986] 1 SCR 306). These involve “relationships within Indian families and  
reserve communities, matters that could be considered absolutely indispensable and essential to  
their cultural survival”: Canadian Western Bank at para 61. It has similarly been suggested that  
“Indianness” would include “rights so closely connected with Indian status that they should be  
regarded as necessary incidents of status such for instance as registrability, membership in a band,  
the right to participate in the election of Chiefs and Band Councils, reserve privileges, etc.”: Four  
B Manufacturing v United Garmet Workers, [1980] 1 SCR 1031 at 1048.  
[157] In the result, provincial laws of general application will apply to “Indians, and Lands  
reserved for the Indians” providing they do not impair the core of Parliament’s power under  
s 91(24). While legislation that singles out Indigenous people for special treatment is ultra vires  
the province, legislation that merely regulates Indigenous peoples and their property as members  
of the broader community is not, even if the provincial legislation has a disproportionate effect on  
them: Kitkatla at paras 66-69. Indigenous peoples are citizens of the provinces in which they live  
and are therefore, in their day-to-day activities, subject to provincial laws of general application.  
That would include, for example, provincial laws under which a provincial authority has approved  
an intra-provincial project for the development of natural resources or a roadway or electrical  
power plant.  
B.  
Section 35 of the Constitution Act, 1982  
[158] Section 35 of the Constitution Act, 1982 is not a source of jurisdiction. It does not amend  
or displace the distribution of legislative powers between federal and provincial governments  
under the Constitution Act, 1867. Therefore, the Crown’s duties to Indigenous peoples do not  
inform a vires analysis under the division of powers.  
92  
A municipal bylaw regulating and imposing a fee for the removal of gravel was found within provincial jurisdiction  
since it did not regulate the use of land on a reserve even though gravel was being removed from reserve lands.  
93  
Section 88 of the Indian Act extends the effects of valid provincial laws of general application in certain  
circumstances notwithstanding that they would otherwise be inapplicable to “Indians” under the interjurisdictional  
immunity doctrine.  
94  
The core has also been described as going to the “status and rights of Indians”: NIL/TU,O at paras 66, 70: Guy  
Régimbald & Dwight Newman, The Law of the Canadian Constitution, 2nd ed (Toronto: LexisNexis, 2017) at 828.  
Page: 53  
[159] Section 35 recognizes and affirms “[t]he existing aboriginal and treaty rights of the  
aboriginal peoples of Canada”. Its purpose is to “facilitate the ultimate reconciliation of prior  
Aboriginal occupation with de facto Crown sovereignty”: Taku River Tlingit First Nation v  
British Columbia (Project Assessment Director), 2004 SCC 74 at para 42, [2004] 3 SCR 550. The  
assertion of Crown sovereignty gives rise to the concept of “the honour of the Crown”, and it too  
has reconciliation as its purpose: Mikisew Cree First Nation v Canada (Governor General in  
Council), 2018 SCC 40 at paras 21-22, [2018] 2 SCR 765 [Mikisew 2018]; Manitoba Metis  
Federation Inc. v Canada (Attorney General), 2013 SCC 14 at para 66, [2013] 1 SCR 623  
[Manitoba Metis Federation]. The honour of the Crown is engaged by s 35 and considered a  
“constitutional principle”: Manitoba Metis Federation at para 69.95  
[160] The honour of the Crown imposes a number of obligations, one of which is the “duty to  
consult and accommodate”: Haida Nation v British Columbia (Minister of Forests), 2004 SCC  
73 at paras 16-38, [2004] 3 SCR 511 [Haida Nation]. This duty is not restricted to the federal  
Crown; it is owed by both levels of government: Grassy Narrows First Nation v Ontario (Natural  
Resources), 2014 SCC 48 at para 33, [2014] 2 SCR 447 [Grassy Narrows]; Haida Nation at paras  
57-59. Where a province has the power to “take up” lands under a treaty, its right to do so is subject  
to the province’s duty to consult and, if appropriate, accommodate Aboriginal interests: Grassy  
Narrows at para 51.96 Taking up lands under a treaty may include, for example, settlement,  
mining, lumbering, extraction of natural resources or other purposes.  
[161] The constitutional guarantee of Aboriginal rights in s 35 operates as a limitation on both  
federal and provincial legislative powers: Tsilhqot’in Nation v British Columbia, 2014 SCC 44  
at para 142, [2014] 2 SCR 256 [Tsilhqot’in Nation]. The scope of their respective obligations is  
defined by the jurisdictional limits of each level of government under the division of powers.  
[162] It has long been accepted that Canada has the jurisdiction under s 91(24) to regulate and  
infringe s 35 Aboriginal and treaty rights: R v Sparrow, [1990] 1 SCR 1075 at 1109 [Sparrow]. In  
Tsilhqot’in Nation, the Supreme Court confirmed that the doctrine of interjurisdictional immunity  
should be applied with restraint and should not be used to preclude a province from regulating and  
infringing s 35 Aboriginal rights: paras 131-152. It specifically concluded that Aboriginal rights  
under s 35 are not part of the “core” of s 91(24): paras 133-135, 140.97 Thus, “provincial regulation  
of general application will apply to exercises of Aboriginal rights, including Aboriginal title land,  
subject to the s. 35 infringement and justification framework” set out in Sparrow: para 150.  
95  
See also Mikisew 2018 at para 24; Southwind v Canada, 2021 SCC 28 at para 55, citing Brian Slattery, “The  
Aboriginal Constitution” (2014) 67 SCLR (2d) 319 at 320.  
96  
“When a government be it the federal or a provincial government exercises Crown power, the exercise of that  
power is burdened by the Crown obligations toward the Aboriginal people in question”: Grassy Narrows at para 50,  
emphasis in original.  
97  
As the Supreme Court explained, while s 35 operates as a limit on both federal and provincial powers, it has “nothing  
to do with whether something lies at the core of the federal government’s powers”: para 142.  
Page: 54  
[163] The same is true with respect to treaty rights. Interjurisdictional immunity does not  
preclude a province which “takes up” land from justifying any infringement of a treaty right:  
Grassy Narrows at para 53. While Tsilhqot’in Nation and Grassy Narrows did not abolish the  
idea that s 91(24) has a “core” which protects against provincial intrusion, they did remove  
Aboriginal and treaty rights from that “core”.98 The result is that interjurisdictional immunity no  
longer applies to s 35 rights. As a consequence, provincial authority has been enlarged with respect  
to Aboriginal and treaty rights.99  
XI. Division of Powers Framework  
A.  
The Two Stages in a Division of Powers Analysis  
[164] Reviewing legislation for validity on federalism grounds involves a two-stage analytical  
approach: (1) characterization; and (2) classification. First, the subject matter (or “pith and  
substance”) of the challenged legislation must be characterized. Second, that subject matter must  
be classified by reference to federal and provincial heads of power: References re Greenhouse  
Gas Pollution Pricing Act SCC at para 47; Genetic Non-Discrimination at para 26; Desgagnés  
Transport at para 30; Reference re Pan-Canadian Securities Regulation, 2018 SCC 48 at  
para 86, [2018] 3 SCR 189 [Second Securities Reference].  
[165] A statute and related regulations will be considered together for purposes of constitutional  
characterization where the regulations give “concrete meaning and content to the statute and [are]  
indispensable to its classification”: R v Morgentaler, [1993] 3 SCR 463 at 481 [Morgentaler],  
discussing Texada Mines Ltd. v Attorney-General of British Columbia, [1960] SCR 713. As  
explained in Red Chris at para 31, citing Ruth Sullivan, Sullivan on the Construction of Statutes,  
5th ed (Markham, Ont.: LexisNexis, 2008) at 370, “‘[w]hen regulations are made to complete the  
statutory scheme, they are clearly intended to operate together and to be mutually informing’”.100  
[166] The Regulations constitute an integral part of this legislative scheme. The Act provides a  
statutory framework; the Regulations make that framework operative. It is the Regulations which  
101  
list the designated projects subject to the federal environmental impact assessment.  
98  
Daniels at para 51. See also HW Roger Townshend, “What Changes Did Grassy Narrows First Nation Make to  
Federalism and Other Doctrines?” (2017) 95:2 Can Bar Rev 459 at 478-479.  
99  
According to Bruce McIvor & Kate Gunn, “Stepping into Canada’s Shoes: Tsilhqot’in, Grassy Narrows and the  
Division of Powers” (2016) 67 UNBLJ 146, the result has been a “significant expansion of provincial authority to  
legislate in ways that could infringe the rights of Indigenous Peoples” (160) while “narrowing federal exclusivity in  
relation to Aboriginal and treaty rights” (165).  
100  
See also R v Campbell, [1999] 1 SCR 565 at para 26; Monsanto Canada Inc. v Ontario (Superintendent of  
Financial Services), 2004 SCC 54 at para 35, [2004] 3 SCR 152.  
101  
The definition of “effects within federal jurisdiction” and the scope of the 7 prohibitions can also be expanded by  
order of the Governor in Council: Act, s 7(1)(a)(iv), s 7(1)(e), s 7(2).  
Page: 55  
Accordingly, the Act and Regulations should be considered together to properly characterize and  
classify the legislative scheme as a whole.  
1.  
Characterization of the “Matter” of the Challenged Law  
[167] The first stage requires characterizing the “matter” of the challenged law by identifying its  
“dominant purpose” or “dominant or most important characteristic”: Genetic Non-Discrimination  
at para 29; Desgagnés Transport at para 31. It is this “pith and substance” or “true subject matter”  
or “caractère véritable” that must be identified because ss 91 and 92 of the Constitution Act, 1867  
provide that both levels of government are authorized to “make Laws in relation” to certain  
“Matters”: Genetic Non-Discrimination at para 28; References re Greenhouse Gas Pollution  
Pricing Act SCC at para 51; Second Securities Reference at para 86. The first stage has also been  
colloquially described by asking the question “What’s it all about?”102 or “What in fact does the  
law do and why?”103  
[168] Characterization requires looking at both the purpose of the law and its effects. In  
determining the purpose, a court is entitled to consider intrinsic evidence such as the legislation’s  
preamble or purposes clause and extrinsic evidence such as Hansard or minutes of parliamentary  
committees: Kitkatla at para 53; Canadian Western Bank at para 27. Although Parliament’s  
choice of means is not determinative of the legislation’s true subject matter, it may be relevant to  
consider the legislative choice of means in defining a statute’s purpose: References re Greenhouse  
Gas Pollution Pricing Act SCC at paras 53-54. Looking beyond the overarching purpose to the  
means selected to achieve that purpose may give a more accurate definition of the true matter of  
the legislation.  
[169] The effects of the law refer to both legal effects and practical effects: Reference re  
Securities Act, 2011 SCC 66 at para 64, [2011] 3 SCR 837 [First Securities Reference]; Kitkatla  
at para 54. Legal effects are those which flow directly from the provisions of the statute itself,  
whereas practical effects are “side” effects that flow from the application of the statute: References  
re Greenhouse Gas Pollution Pricing Act SCC at para 51; Kitkatla at para 54. In particular, the  
legal effects refer to “how the legislation as a whole affects the rights and liabilities of those subject  
to its terms, and is determined from the terms of the legislation itself”: Morgentaler at 482.  
Practical effects are “the actual or predicted results of the legislation’s operation and  
administration”: Morgentaler at 486. The legal effects flow directly from the provisions of the  
statute and the practical effects flow from its application. Effects must therefore include the law’s  
“practical operation in the every-day world.”104  
102  
Desgagnés Transport at para 35, citing A. S. Abel, “The Neglected Logic of 91 and 92” (1969) 19:4 UTLJ 487 at  
490.  
103  
D.W. Mundell, “Tests for Validity of Legislation under the British North America Act: A Reply to Professor  
Laskin” (1955) 33:8 Can Bar Rev 915 at 928 [Mundell], cited in Hogg at §15:5.  
104  
Mundell at 928.  
Page: 56  
[170] The pith and substance should be described as definitively as possible, capturing the law’s  
essential character in terms that are “as precise as the law will allow”: References re Greenhouse  
Gas Pollution Pricing Act SCC at para 52; Genetic Non-Discrimination at para 32.105 A precise  
statement “more accurately reflects the true nature of what Parliament did and what it intended to  
do”: References re Greenhouse Gas Pollution Pricing Act SCC at para 69. Precision also means  
that characterization is less likely to be influenced by classification: Genetic Non-Discrimination  
at para 31.  
[171] The corollary of characterizing legislation according to its “pith and substance” is that  
“incidental effects” outside the jurisdiction of the legislature that enacted it are irrelevant to the  
law’s validity: Canadian Western Bank at para 28. As stated in Rogers Communications Inc. v  
Châteauguay (City), 2016 SCC 23 at para 37, [2016] 1 SCR 467 [Rogers Communications],  
“[t]he fact that a measure has what are merely incidental effects on an exclusive head of power of  
the other level of government does not suffice to justify declaring that measure to be ultra vires”.  
Effects are merely “incidental” when they are “collateral and secondary to the mandate of the  
enacting legislature” even if of “significant practical importance”: Canadian Western Bank at  
para 28.  
2.  
Classification Under Head of Power  
[172] The second stage requires the court to assign the “matter” to one of the heads of legislative  
power: Hogg at §15:4. This is also sometimes referred to as determining the “class(es) of subjects”  
into which the matter falls: Desgagnés Transport at para 38; Quebec (Attorney General) v  
Canada (Attorney General), 2015 SCC 14 at para 29, [2015] 1 SCR 693 [Quebec (Attorney  
General)]. But since not all powers are limited to a class of subjects, the court’s task is more  
accurately described as determining “whether the subject matter of the challenged legislation falls  
within the head of power being relied on to support the legislation’s validity”: Second Securities  
Reference at para 86. In the present case, the impugned legislation will be valid if, as Canada  
argues, its subject matter falls within federal heads of power under s 91 and s 132 of the  
Constitution Act, 1867. Conversely, it will be ultra vires Parliament and thus invalid if, as Alberta  
argues, the subject matter improperly intrudes into provincial heads of power set out in s 92 and  
s 92A(1) of the Constitution Act, 1867.  
B.  
Importance of Keeping the Two Stages Separate  
[173] Characterization of the law and its classification are distinct steps, meaning that “the pith  
and substance of a statute or a provision must be identified without regard to the heads of  
legislative competence”: References re Greenhouse Gas Pollution Pricing Act SCC at para 56.  
105  
A vague or general description can result in the law being superficially assigned to both federal and provincial  
heads of powers or exaggerate the extent to which the law extends into the other level of government’s sphere of  
jurisdiction: References re Greenhouse Gas Pollution Pricing Act SCC at para 52; Genetic Non-Discrimination at  
para 32; Desgagnés Transport at para 35.  
Page: 57  
Otherwise there is “a danger that the whole exercise will become blurred and overly oriented  
towards results”: Chatterjee v Ontario (Attorney General), 2009 SCC 19 at para 16, [2009] 1 SCR  
624.106 Classification sometimes requires interpreting the scope of the claimed head of power as,  
for example, in the case of “Trade and Commerce” under s 91(2) or “Criminal Law” under  
s 91(27): Desgagnés Transport at paras 39-41; First Securities Reference at para 65; Quebec  
(Attorney General) at para 32.  
C.  
The Pith and Substance Doctrine and the Environment  
[174] The pith and substance doctrine remains the primary analytical tool for resolving division  
of powers disputes: Canadian Western Bank at paras 25-26; Firearms Reference at para 16;  
Kitkatla at para 52; Desgagnés Transport at para 121, per Wagner CJ and Brown J concurring.  
That is so even where the environment is involved.  
[175] The environment covers everything in life, from what we do, to how we live, to the values  
we hold dear, to ensuring the safety of the planet, to mitigating the effects of climate change for  
which humans are responsible, to concerns about future generations, to how we organize our  
economies, to sustainable development, to the ethical treatment of animals and more. But as vital  
as the environment is to all forms of life on this planet, it is not, for constitutional purposes, a  
superordinate subject matter that transcends or trumps the division of powers.  
[176] As explained, some “aspects” of the environmental effects of an intra-provincial designated  
project may be within provincial jurisdiction, others federal. In this context, “aspect” means legal  
aspect, as in the legal aspect of facts, the facts being the environmental effects of the intra-  
provincial designated project. However, simply because both government levels have legislative  
authority over different legal aspects of those effects does not mean that regulation of the intra-  
provincial designated project overall is a true matter of double aspect and thus subject to the double  
aspect doctrine.  
[177] The double aspect doctrine recognizes that “the same fact situations can be regulated from  
different perspectives, one of which may relate to a provincial power and the other to a federal  
power”: Desgagnés Transport at para 84. Under this doctrine, both levels of government are able  
to legislate with respect to the same fact situation using different heads of power. Hogg notes at  
§15:7 that the double aspect doctrine may more properly be described as the “double matter”  
doctrine.  
[178] But Parliament has no head of power entitling it to regulate intra-provincial designated  
projects, or their environmental effects, generally. And since the environment is not a head of  
power, such regulation cannot be based on the environment alone. Neither the environment, nor  
environmental regulation, is an independent subject matter of jurisdiction for either government  
106  
A “matter” may be described using “the very language of a class of subject”. Where that occurs, the identification  
of the “matter” will effectively settle the issue of the law’s validity, classification being a formality: Hogg at §15:5.  
Page: 58  
level.107 As a diffuse subject, the environment cuts across several different areas of constitutional  
responsibility, some provincial, some federal. For both government levels, legislation relating to  
the environment or environmental protection must be tied to a specific head of power under the  
Constitution. In other words, the legislation must actually fall within the specific characteristics of  
the head of power under which it is claimed to be justified: Hydro-Québec at paras 112, 114.  
[179] Therefore, where an activity, such as an intra-provincial designated project, is otherwise  
within exclusive provincial jurisdiction, Parliament’s jurisdiction is limited to the environmental  
effects of that activity on a federal head of power.108 Accordingly, the fact one aspect of the  
environmental effects of an intra-provincial designated project, the fisheries aspect for example,  
falls within federal jurisdiction does not give Parliament the jurisdiction to regulate the intra-  
provincial designated project itself from beginning to end.109 If it did, that would be a back door  
route to the federal government’s securing what amounts to exclusive jurisdiction over the  
environment and all intra-provincial activities. That is because where a conflict arises between  
federal laws and provincial laws, under the doctrine of paramountcy, the federal law would prevail.  
[180] Were that to happen, the only way for the courts to preserve any vestige of provincial  
jurisdiction would be through the doctrine of interjurisdictional immunity. That would invariably  
turn division of powers disputes between the federal and provincial governments from an analysis  
of the pith and substance of challenged laws into a dispute about interjurisdictional immunity and  
its boundaries for every head of provincial power.110 The preferable approach is for the courts to  
reaffirm the validity and utility of the pith and substance doctrine which has been the constitutional  
foundation for resolution of division of powers disputes for more than 120 years: Union Colliery  
Co. of British Columbia v Bryden, [1899] AC 580 (PC).111 That includes recognizing when the  
double aspect doctrine properly applies and to what and when it does not.  
D.  
The POGG Power  
107  
“Environmental regulation is not an ‘independent’ matter of jurisdiction but rather is a function of the exercise of  
particular heads of power”: Kennett at 186.  
108  
Within a head of power means that the government has the power to enact laws coming within that head of power.  
109  
As noted in Moses SCC at para 36: “The mining of non-renewable mineral resources aspect falls within provincial  
jurisdiction but the fisheries aspect is federal”.  
110  
We recognize that the doctrine of interjurisdictional immunity, which protects the exclusivity principle under the  
division of powers, may be viewed as subsumed in the pith and substance doctrine itself rather than independent of it.  
As noted in Desgagnés Transport at para 161, per Wagner CJ and Brown J (concurring), “the idea underlying the  
doctrine of interjurisdictional immunity is better understood not as an independent doctrine, but as a function of the  
pith and substance test, properly understood and applied”.  
111  
As the Supreme Court explained in Canada (Attorney General) v PHS Community Services Society, 2011 SCC  
44 at para 65, [2011] 3 SCR 134 [Insite] in seeking to narrow the reach of interjurisdictional immunity: “... in areas  
of overlapping jurisdiction, the modern trend is to strike a balance between the federal and provincial governments,  
through the application of pith and substance analysis and a restrained application of federal paramountcy.”  
Page: 59  
[181] Section 91 of the Constitution Act, 1867 confers on the federal Parliament the power “to  
make Laws for the Peace, Order, and good Government of Canada, in relation to all Matters not  
coming within the Classes of Subjects by this Act assigned exclusively to the Legislatures of the  
Provinces....” Parliament’s POGG power is residuary as it is expressly confined to matters not  
coming within the classes of subjects assigned exclusively to the provinces. The POGG power  
includes different branches. One is the “national concern” branch.  
[182] That branch was recently restated by the majority of the Supreme Court in References re  
Greenhouse Gas Pollution Pricing Act SCC in assessing the constitutionality of the Greenhouse  
Gas Pollution Pricing Act, SC 2018, c 12, s 186 [GGPPA]. The federal statute established both a  
fuel charge on various types of carbon-based fuel and a pricing mechanism for greenhouse gas  
(GHG) emissions of certain industrial facilities in provinces determined to lack sufficiently  
stringent standards. A number of provinces challenged Parliament’s authority to pass the  
legislation which Canada sought to justify solely on the basis of the “national concern” doctrine.  
[183] The majority of the Supreme Court characterized the “pith and substance” of the GGPPA  
as “establishing minimum national standards of GHG price stringency to reduce GHG emissions”:  
References re Greenhouse Gas Pollution Pricing Act SCC at paras 57, 80. It then applied this  
same characterization of the matter of the statute to its analysis of the proposed “matter” of  
“national concern” (paras 114, 119). The majority ultimately held that the GGPPA was intra vires  
Parliament on the basis of the “national concern” doctrine, concluding that establishing minimum  
national standards of GHG price stringency to reduce GHG emissions was a matter of national  
concern (para 207).  
[184] Prior to that decision, the leading articulation of the national concern doctrine was a four-  
part test set out by Le Dain J in R v Crown Zellerbach Canada Ltd., [1988] 1 SCR 401 at 431-32  
[Crown Zellerbach].112 The majority in References re Greenhouse Gas Pollution Pricing Act  
SCC emphasized that “the test for finding that a matter is of national concern is an exacting one”  
(para 208) and that courts “must approach a finding that the federal government has jurisdiction  
on the basis of the national concern doctrine with great caution” (para 142). The majority restated  
the four-part test from Crown Zellerbach as a three-part test at paras 163-166:  
112  
“1. The national concern doctrine is separate and distinct from the national emergency doctrine of the peace, order  
and good government power, which is chiefly distinguishable by the fact that it provides a constitutional basis for  
what is necessarily legislation of a temporary nature; 2. The national concern doctrine applies to both new matters  
which did not exist at Confederation and to matters which, although originally matters of a local or private nature in  
a province, have since, in the absence of national emergency, become matters of national concern; 3. For a matter to  
qualify as a matter of national concern in either sense it must have a singleness, distinctiveness and indivisibility that  
clearly distinguishes it from matters of provincial concern and a scale of impact on provincial jurisdiction that is  
reconcilable with the fundamental distribution of legislative power under the Constitution; 4. In determining whether  
a matter has attained the required degree of singleness, distinctiveness and indivisibility that clearly distinguishes it  
from matters of provincial concern it is relevant to consider what would be the effect on extra-provincial interests of  
a provincial failure to deal effectively with the control or regulation of the intra-provincial aspects of the matter.”  
Page: 60  
First, Canada must establish that the matter is of sufficient concern  
to the country as a whole to warrant consideration as a possible  
matter of national concern. This question arises in every case,  
regardless of whether the matter can be characterized as historically  
new. If Canada discharges its burden at the step of this threshold  
inquiry, the analysis will proceed.  
Second, the court must undertake the analysis explained in Crown  
Zellerbach through the language of “singleness, distinctiveness and  
indivisibility”. More important than this terminology, however, are  
the principles underpinning the inquiry. The first of these principles  
is that, to prevent federal overreach, jurisdiction based on the  
national concern doctrine should be found to exist only over a  
specific and identifiable matter that is qualitatively different from  
matters of provincial concern. The second principle to be considered  
at this stage of the inquiry is that federal jurisdiction should be found  
to exist only where the evidence establishes provincial inability to  
deal with the matter.  
If these two principles are satisfied, the court will proceed to the  
third and final step and determine whether the scale of impact of the  
proposed matter of national concern is reconcilable with the division  
of powers.  
The onus is on Canada throughout this analysis, and evidence is  
required. Where a proposed federal matter satisfies the requirements  
of all three steps of the framework, there is a principled basis to  
conclude that the matter is one that, by its nature, transcends the  
provinces and should be recognized as a matter of national concern.  
[185] Importantly, the majority in References re Greenhouse Gas Pollution Pricing Act SCC  
did not expand the breadth of “national concern” any further than carbon pricing. In particular, it  
did not broaden Parliament’s authority to include the regulation of GHG emissions generally.  
Accordingly, Parliament’s jurisdiction under the “national concern” doctrine in relation to GHG  
emissions extends only to establishing minimum national standards of GHG price stringency to  
reduce GHG emissions, a point to which we return later.  
E.  
Cooperative Federalism and Caution  
[186] The courts adopted cooperative federalism as a means of accommodating overlapping  
jurisdiction and encouraging intergovernmental cooperation: References re Greenhouse Gas  
Pollution Pricing Act SCC at para 50; Genetic Non-Discrimination at para 22; First Securities  
Reference at para 57. It has been described as the “dominant tide” of modern federalism, which  
Page: 61  
“finds its principled underpinning in the concern that a court should favour, where possible, the  
ordinary operation of statutes enacted by both levels of government”: Canadian Western Bank at  
para 37, emphasis in original; see also Rogers Communications at para 38; Second Securities  
Reference at para 17.113  
[187] However, cooperative federalism has its limits. It supports, but does not supplant, or  
modify, the division of powers: Second Securities Reference at para 18; References re  
Greenhouse Gas Pollution Pricing Act SCC at para 50. “The ‘dominant tide’ of flexible  
federalism, however strong its pull may be, cannot sweep designated powers out to sea, nor erode  
the constitutional balance inherent in the Canadian federal state”: First Securities Reference at  
para 62. Cooperative federalism cannot be used to make an otherwise unconstitutional law a valid  
one: Rogers Communications at para 39; Second Securities Reference at para 18. Nor to impose  
limits on the otherwise valid exercise of legislative competence: Quebec (Attorney General) at  
para 19; Rogers Communications at para 39; Second Securities Reference at para 18. Nor to  
mandate cooperation where the division of powers authorizes one level of government to act  
unilaterally: Quebec (Attorney General) at para 20; Genetic Non-Discrimination at para 25.  
[188] Further, where the two orders of government are at odds, reliance on cooperative  
federalism risks eroding the boundaries of provincial jurisdiction by favouring the federal  
government and centralization of authority: Eugenie Brouillet, “The Supreme Court of Canada:  
The Concept of Cooperative Federalism and Its Effect on the Balance of Power” in Nicholas  
Aroney & John Kincaid eds, Courts in Federal Countries: Federalists or Unitarists? (Toronto:  
University of Toronto Press, 2017) 135 at 156-159, 163; see also Asher Honickman, “Watertight  
Compartments: Getting Back to the Constitutional Division of Powers” (2017) 55:1 Alta L Rev  
225 at 250-251 [Honickman].114  
[189] To be effective, cooperative federalism must be grounded in mutual respect for the  
constitutional dividing lines and the recognition, and acceptance, by each government level of its  
own jurisdictional limitations. The concept is cooperative, not coercive, federalism.  
XII. The First Stage: Characterization – What is the “Matter” of the IAA?  
A.  
1.  
Introduction  
The IAA Two Acts in One  
113  
Courts will not generally interfere with cooperative regulatory schemes so long as they are compatible with the  
bounds of the Constitution: Second Securities Reference at para 18.  
114  
To put it the way that Honickman has at 246, 250-251: “The concept of flexible federalism is more than simply  
extra-textual; it is contra-textual. It does not sit uncomfortably or even awkwardly with the text; it sits entirely apart....  
[I]t is at least arguable that unfettered discretion serves as a disincentive for cooperation and is much more likely to  
produce federal domination by way of the paramountcy doctrine” (emphasis in original).  
Page: 62  
[190] The IAA is essentially two acts in one. One act, as reflected in ss 81 to 91 of the Act, covers  
activities within exclusive federal jurisdiction on federal lands or outside Canada that have not  
been designated as “designated projects” by the federal executive.115 These activities are subject  
to an entirely different impact assessment and regulatory regime than that which applies to  
“designated projects”. No one has challenged ss 81 to 91. The second act, as reflected in the  
balance of this legislative scheme, covers all activities designated as “designated projects” by the  
federal executive.  
[191] Including in this legislative scheme two distinct regimes, one of which is constitutionally  
intra vires, does not enhance the constitutionality of the other. Further, with respect to the second  
act, the environmental assessment of federal designated projects versus intra-provincial designated  
projects is manifestly distinct in ordinary legal and factual terms, let alone constitutional terms.  
B.  
1.  
Purpose of the Legislative Scheme  
Intrinsic Evidence of Purpose  
a.  
Title  
[192] A law’s title, especially its long title, is an important form of intrinsic evidence since both  
titles are an integral part of the law: Ruth Sullivan, Sullivan on the Construction of Statutes, 6th ed  
(Markham, Ont.: LexisNexis Canada, 2014) at §14.13-§14.15. However, while a statute’s title can  
be a useful tool for the purposes of characterizing its true subject matter, it is not determinative:  
References re Greenhouse Gas Pollution Pricing Act SCC at para 58.  
[193] The full name of the Act is “An Act respecting a federal process for impact assessment and  
the prevention of significant adverse environmental effects”. This reflects one of the focusses of  
the Act, namely the establishment of a federal impact assessment process.116 The other key one,  
as evidenced by the substantive decision-making elements under the Act, is the establishment of a  
federal regulatory regime for all designated projects. Further, although the title refers to the  
115  
Federal lands is defined in s 2 as “(a) lands that belong to Her Majesty in right of Canada, or that Her Majesty in  
right of Canada has the power to dispose of, and all waters on and airspace above those lands, other than lands under  
the administration and control of the Commissioner of Yukon, the Northwest Territories or Nunavut; (b) the following  
lands and areas: (i) the internal waters of Canada, in any area of the sea not within a province, (ii) the territorial sea of  
Canada, in any area of the sea not within a province, (iii) the exclusive economic zone of Canada, and (iv) the  
continental shelf of Canada; and (c) reserves, surrendered lands and any other lands that are set apart for the use and  
benefit of a band and that are subject to the Indian Act, and all waters on and airspace above those reserves or lands.  
(territoire domanial)”  
116  
Canada describes the review process as a “federal environmental assessment process to protect against adverse  
environmental effects”. Alberta describes it as a “comprehensive impact assessment regime” requiring “a broad  
ranging assessment of ... impacts, environmental and other”. Given the breadth of the assessment of the “effects” and  
“factors” contemplated under this legislative scheme, it is more accurate to describe the review as an “impact  
assessment” rather than the more restrictive “environmental assessment”. That is also how it is described in the Act  
itself.  
Page: 63  
“prevention of significant adverse environmental effects”, as we explain later, the Act is not limited  
to preventing significant adverse environmental effects. Nor is it limited, when applied to intra-  
provincial designated projects, to preventing adverse effects within Parliament’s jurisdiction.  
b.  
Preamble  
[194] Legislative bodies cannot through statutory recitals settle the classification of their own  
statutes for purposes of the division of powers: W. R. Lederman, Continuing Canadian  
Constitutional Dilemma: Essays on the Constitutional History, Public Law and Federal System of  
Canada (Toronto: Butterworths, 1981) at 282. However, while the preamble of a statute is not  
conclusive, it can nevertheless be useful “to illustrate the ‘mischief’ the legislation is designed to  
cure and the goals Parliament sought to achieve”: References re Greenhouse Gas Pollution  
Pricing Act SCC at para 59. Similarly, the preamble of the Bill enacting the challenged statute can  
also be helpful.  
[195] The Act was enacted as part of Bill C-69. The preamble to Bill C-69 states:  
Whereas the Government of Canada is committed to implementing  
an impact assessment and regulatory system that Canadians trust  
and that provides safeguards to protect the environment and the  
health and safety of Canadians;  
Whereas the Government of Canada is committed to enhancing  
Canada’s global competitiveness by building a system that enables  
decisions to be made in a predictable and timely manner, providing  
certainty to investors and stakeholders, driving innovation and  
enabling the carrying out of sound projects that create jobs for  
Canadians;  
Whereas the Government of Canada is committed to achieving  
reconciliation with First Nations, the Métis and the Inuit through  
renewed nation-to-nation, government-to-government and Inuit-  
Crown relationships based on recognition of rights, respect, co-  
operation and partnership;  
Whereas the Government of Canada is committed to using  
transparent processes that are built on early engagement and  
inclusive participation and under which the best available scientific  
information and data and the Indigenous knowledge of the  
Indigenous peoples of Canada are taken into account in decision-  
making;  
Page: 64  
And whereas the Government of Canada is committed to assessing  
how groups of women, men and gender-diverse people may  
experience policies, programs and projects and to taking actions that  
contribute to an inclusive and democratic society and allow all  
Canadians to participate fully in all spheres of their lives;  
[196] The first item in the preamble to Bill C-69 refers to implementing “an impact assessment  
and regulatory system” and protecting “the environment and health and safety of Canadians”. The  
remaining items recite Canada’s commitment to a wide range of other federal priorities, such as  
“enhancing global competitiveness”, “driving innovation”, creating “jobs”, “achieving  
reconciliation” and contributing to an “inclusive” society for women, men and gender-diverse  
people.  
[197] The preamble of the Act itself also confirms that designated projects are to be assessed  
based on a similarly wide range of federal priorities.117 It affirms Canada’s commitment to  
“fostering sustainability”, “ensuring respect for the rights of Indigenous peoples”, “fostering  
reconciliation”, and “implementing the United Nations Declaration on the Rights of Indigenous  
Peoples”. It also affirms that “impact assessment contributes to Canada’s ability to meet its  
environmental obligations and its commitments in respect of climate change” and it speaks of  
encouraging innovation to reduce adverse changes “to the environment and to health, social or  
economic conditions”.  
[198] Not only do such broad-ranging objectives in the preambles to both Bill-69 and the Act  
extend well beyond preventing significant adverse environmental effects, but, when applied to  
intra-provincial designated projects, many are not even linked to a federal head of power. Further,  
the preamble to the Act also recognizes that the Act extends beyond impact assessment and includes  
“decision-making processes related to designated projects”.  
c.  
Statutory Purposes of the Act  
117  
The Act’s preamble includes the following: “Whereas the Government of Canada is committed to fostering  
sustainability; Whereas the Government of Canada recognizes that impact assessments provide an effective means of  
integrating scientific information and Indigenous knowledge into decision-making processes related to designated  
projects; ... Whereas the Government of Canada is committed, in the course of exercising its powers and performing  
its duties and functions in relation to impact, regional and strategic assessments, to ensuring respect for the rights of  
the Indigenous peoples of Canada recognized and affirmed by section 35 of the Constitution Act, 1982, and to fostering  
reconciliation and working in partnership with them; Whereas the Government of Canada is committed to  
implementing the United Nations Declaration on the Rights of Indigenous Peoples; ... Whereas the Government of  
Canada recognizes that impact assessment contributes to Canada’s ability to meet its environmental obligations and  
its commitments in respect of climate change; Whereas the Government of Canada recognizes the importance of  
encouraging innovative approaches and technologies to reduce adverse changes to the environment and to health,  
social or economic conditions.”  
Page: 65  
[199] While a statement of legislative intent is often a useful tool, courts “must nevertheless seek  
to ascertain the true purpose of the legislation, as opposed to its mere stated or apparent purpose”:  
Canadian Western Bank at para 27, emphasis in original.  
[200] The stated purposes of the Act set out in s 6(1) include “to ensure that impact assessments  
of designated projects take into account all effects both positive and adverse that may be  
caused by the carrying out of designated projects”: Act, s 6(1)(c). This expressly contemplates that  
the impact assessment will consider all effects, which includes “changes to the environment or to  
health, social or economic conditions and the positive and negative consequences of these  
changes”, that may be caused by a designated project: Act, s 2. The rest of the purpose clause in  
s 6(1) focuses on other expansive federal considerations. The drift away from preventing  
significant adverse environmental effects when applied to intra-provincial designed projects is  
both manifest and extensive: enhancing “Canada’s competitiveness”, encouraging “innovation in  
the carrying out of designated projects”, creating “opportunities for sustainable economic  
development”, and encouraging “the assessment of the cumulative effects of physical activities in  
a region”.  
[201] The stated purpose to consider all effects that may be caused by a designated project is  
echoed in the s 22 mandatory factors. These include “the changes to the environment or to health,  
social or economic conditions and the positive and negative consequences of these changes...”:  
Act, s 22(1)(a). The balance of the s 22 mandatory factors focus on federal objectives and priorities,  
a number of which extend well beyond significant adverse environmental effects, and again, which  
are not, when applied to intra-provincial designated projects, all linked to federal heads of power.  
2.  
Extrinsic Evidence of Purpose  
[202] While statements made during parliamentary debate are to be viewed with caution, a  
statute’s legislative history, including legislative debates, can nonetheless be helpful in discerning  
Parliament’s purpose: References re Greenhouse Gas Pollution Pricing Act SCC at paras 62-68.  
[203] The legislative debates on Bill C-69 confirm the intended breadth of the IAA. Before the  
Standing Committee on Environment and Sustainable Development, the Minister of Environment  
stated that “assessments will consider not just environmental impacts of projects, but also the  
social, health and economic impacts they may cause”.118 This theme was repeated throughout the  
debate on Bill C-69 including the Minister’s introductory remarks on third reading where she said  
the Bill provided for “project reviews that consider a wide range of positive and negative impacts  
on the economy, health, indigenous rights, and communities, in addition to the environment ....”119  
118  
House of Commons, Standing Committee on Environment and Sustainable Development, Evidence, 42-1, No 099  
(22 March 2018) at 2 (Hon Catherine McKenna).  
119  
“Bill C-69 An Act to enact the Impact Assessment Act and the Canadian Energy Regulatory Act, to amend the  
Navigation Protection Act and to make consequential amendments to other Acts”, 3rd reading, House of Commons  
Debates, 42-1, No 313 (12 June 2018) at 20775 (Hon Catherine McKenna).  
Page: 66  
[204] The legislative debates also reveal that one of the objectives of the legislative scheme is to  
give the federal executive regulatory control over GHG emissions from whatever intra-provincial  
projects it chooses to include in the project list. Speaking before the Standing Committee on  
Environment and Sustainable Development, the Minister of the Environment confirmed that the  
criteria for creating the project list should include “an environmental threshold, including  
greenhouse gas emissions”. 120 At second reading in the House of Commons, the Minister  
confirmed the importance of this federal government priority: “Under Bill C-69, it is clear that we  
will consider the impact projects will have on the climate. We also said that we wanted to conduct  
a strategic environmental assessment to ensure that the projects fit with the climate change action  
plan.”121 Later, when the Minister was asked about the addition of in situ projects to the project  
list, she acknowledged that the federal government’s proposed approach to in situ oil sand projects  
was based on “a cap on emissions”.122  
3.  
Conclusions Relating to Purpose of the IAA  
[205] Together, the intrinsic and extrinsic evidence demonstrate that the purpose of the IAA is to  
establish a federal impact assessment and regulatory regime to review and regulate all effects of  
both federal designated projects and intra-provincial designated projects even though intra-  
provincial designated projects otherwise fall within exclusive provincial jurisdiction and even  
though all effects of intra-provincial designated projects, including GHG emissions therefrom, are  
not within federal heads of power.  
C.  
1.  
Effects of the IAA  
Introduction  
[206] Attentively considered, the effects of the IAA, and here we are speaking of a legal term of  
art, reinforce its dominant purpose.123 “The effects of a law are perhaps a more reliable guide to  
its constitutional validity than its apparent or stated intention. These effects may be legal ones such  
as effects on the rights or obligations of citizens; or practical ones, especially where there is reason  
to believe the enacting government may be attempting to do indirectly what it cannot do directly”:  
120  
House of Commons, Standing Committee on Environment and Sustainable Development, Evidence, 42-1, No 099  
(22 March 2018) at 16 (Hon Catherine McKenna).  
121  
“Bill C-69 An Act to enact the Impact Assessment Act and the Canadian Energy Regulatory Act, to amend the  
Navigation Protection Act and to make consequential amendments to other Acts”, 2nd reading, House of Commons  
Debates, 42-1, No 264 (14 February 2018) at 17204 (Hon Catherine McKenna).  
122  
The Senate, Standing Senate Committee on Energy, the Environment and Natural Resources, Evidence, 42-1, No  
68 (2 May 2019) (Hon Catherine McKenna).  
123  
Legal and practical “effects” of the IAA at law are different than the defined “effects” of a designated project under  
the IAA.  
Page: 67  
Reference re Environmental Management Act (British Columbia), 2019 BCCA 181 at para 14,  
emphasis in original [Environmental Management Act BCCA], aff’d 2020 SCC 1.  
[207] For an intra-provincial activity or class of activities to be designated as a “designated  
project” has serious negative consequences that flow immediately upon designation. The IAA  
triggers federal review of the “effects” of intra-provincial designated projects even where the  
federal government has no decision-making authority with respect to an intra-provincial  
designated project under other valid federal legislation. Further, Parliament has not limited the  
regulation of intra-provincial designated projects to effects actually within federal jurisdiction.  
And even where there are such effects, the regulation is not limited, as required under the division  
of powers, to the consequences, that is effects, of the subject project on a federal head of power.  
[208] Instead, this regulatory regime mandates federal review of all effects of intra-provincial  
designated projects with no requirement that there be any established nexus with a federal head of  
power. Put simply, Parliament has authorized the federal executive to regulate all intra-provincial  
designated projects from inception to completion.  
[209] That this is so may be seen from an analysis of the legal and practical effects of the IAA.124  
2.  
Legal Effects of the IAA  
a.  
Designation and Public Interest Determination vis à vis Intra-Provincial  
Designated Projects Are Not Linked to Federal Decision-Making Authority  
(i)  
Scope of the IAA and Designation of Designated Projects  
[210] The intra-provincial activities swept into this assessment and regulatory regime are not  
limited to those likely to have adverse environmental effects on a matter within federal  
competence.  
[211] The designated projects approach is a fundamental change from the Guidelines Order  
upheld as constitutional in Oldman River. There the federal environmental review process was  
triggered by the existence of a federal regulatory duty with respect to a project.125 CEAA 1992  
retained a similar trigger, though one broader in scope. An intra-provincial project was required to  
undergo an environmental assessment only where the federal government issued a listed permit or  
124  
While characterization and classification are distinct stages of a division of powers analysis, in assessing the IAA’s  
legal effects, it may be necessary, given the self-defined “effects within federal jurisdiction”, to refer to the scope of  
certain federal heads of power in placing those legal effects in their proper context.  
125  
The Guidelines Order required “all federal departments and agencies that have a decision-making authority for  
any proposal, i.e., any initiative, undertaking or activity that may have an environmental effect on an area of federal  
responsibility, to initially screen such proposal to determine whether it may give rise to any potentially adverse  
environmental effects”: Oldman River at 17. A review by an environmental assessment panel was required if the  
proposal could have significant adverse effects.  
Page: 68  
authorization for that project: CEAA 1992, s 5(1).126 In other words, overall, the trigger under  
CEAA 1992 can be understood as projects requiring a federal decision: Meinhard Doelle & Chris  
Tollefson, Environmental Law: Cases and Materials, 3rd ed (Toronto: Thomson Reuters, 2019)  
at 598-99.  
[212] CEAA 2012 changed the trigger for an environmental assessment by introducing the  
concept of a “project list”.127 But not all listed projects required an assessment under CEAA  
2012.128 If a provincial assessment was considered equivalent, that process was followed. The Act  
is similarly “project-based” in that it uses a project list approach, rather than the existence of a  
federal decision-making responsibility, to trigger federal assessments.129 However, as explained,  
from a division of powers perspective, the IAA is fundamentally different in scope than CEAA  
2012. Nor was the constitutionality of that legislation ever challenged by a province.130  
[213] The project list under the Regulations includes activities based on size, whether physical  
size or production output size. For example, a new all-season public highway that requires more  
than 75 km of new right of way (s 51) is included even though wholly within one province and  
within provincial jurisdiction as a local work or undertaking: Constitution Act, 1867, s 92(10).  
While the highway would, if it crossed a provincial boundary, be within federal jurisdiction as an  
interprovincial undertaking under s 92(10)(a), the Regulations make no distinction between  
highways in these two constitutionally distinct categories.  
[214] In addition, the federal government has added to the project list new project types otherwise  
within exclusive provincial jurisdiction and not previously subject to, or claimed to be subject to,  
a federal environmental assessment. That includes in situ oil sands extraction facilities with a  
bitumen production over a certain capacity which do not otherwise require a federal permit.  
126  
An environmental assessment was also required when the project was within exclusive federal jurisdiction, that is  
where the federal government proposed a project, provided financial assistance to a project, or where the project  
involved federal lands.  
127  
Only projects listed by regulation or Ministerial order required an environmental assessment: see CEAA 2012, ss 2,  
14(2), 84(a); Regulations Designating Physical Activities.  
128  
The Agency made a separate “screening decision” to decide if an environmental assessment of the project was  
required: CEAA 2012, s 10.  
129  
See Northey 2020 at 19. Like CEAA 2012, the Act also includes a “screening decision” in s 16 to “decide whether  
an impact assessment of the designated project is required”. But this screening is lengthier since designated projects  
must also now undergo a newly added “planning phase” before the screening decision is undertaken: ibid at 20.  
130  
One author noted the constitutional issues this raised. According to Northey at 245, “[S]ubsection 5(1) [of CEAA  
2012] raises constitutional issues because it triggers some federal review of environmental effects, even where there  
is no federal regulatory decision-making. This approach appears to be inconsistent with Oldman. Oldman made it a  
principle of federal EA that its triggers needed to be tied to federal regulatory decision-making” (underline in original).  
Page: 69  
[215] The Act even gives the federal government the right to designate a project after the physical  
activity has commenced, unless the project “has substantially begun”: Act, s 9(7)(a).131 As a result,  
an intra-provincial designated project can be required to undergo the assessment and review  
process under the IAA after the project has completed a full environmental review, and been  
approved, by applicable provincial authorities, and after work on it has commenced, so long as the  
project has not substantially begun.  
[216] Canada contends that the purposes of the Act constrain the Governor in Council’s  
“regulation-making power to list designated projects to those likely to have adverse federal  
effects”: Factum of the Attorney General of Canada at para 80.132 However, the only limitations  
in the Act governing the exercise of the federal executive’s regulation-making power to designate  
projects are contained in ss 6(2) and 6(3):  
6(2) The Government of Canada, the Minister, the Agency and  
federal authorities, in the administration of this Act, must exercise  
their powers in a manner that fosters sustainability, respects the  
Government’s commitments with respect to the rights of the  
Indigenous peoples of Canada and applies the precautionary  
principle.  
6(3) The Government of Canada, the Minister, the Agency and  
federal authorities must, in the administration of this Act, exercise  
their powers in a manner that adheres to the principles of scientific  
integrity, honesty, objectivity, thoroughness and accuracy.  
[217] These sections provide no direction and prescribe no criteria as to the nature of the intra-  
provincial activities that the federal executive can include as designated projects. Notably, the IAA  
contains no enforceable restriction limiting designation to those “likely to have significant adverse  
federal effects” or even “likely to have adverse federal effects”. Regulations made under a statute  
must be consistent with the enabling statute and its overriding purpose and within the scope of,  
and subject to, the conditions prescribed by that statute: References re Greenhouse Gas Pollution  
Pricing Act SCC at para 87. However, that limitation does not meaningfully limit the federal  
executive’s actions under this legislative scheme since its power to designate intra-provincial  
activities is essentially unconstrained given the Act’s stated purposes.  
131  
CEAA 2012 precluded the Minister from making the designation after the “activity has begun and, as a result, the  
environment has been altered”: s 14(5)(a).  
132  
Canada also points to the RIAS which states that the objective of the project list is to “capture those major projects  
with the greatest potential for adverse effects in areas of federal jurisdiction related to the environment, so that they  
can enter into the impact assessment process”: Regulatory Impact Analysis Statement, (2019) C Gaz II, Vol 153, No  
17, (Physical Activities Regulations, SOR/2019-285), online: <http://www.gazette.gc.ca/rp-pr/p2/2019/2019-08-  
21/html/sor-dors285-eng.html>[RIAS].  
Page: 70  
[218] In any event, the current project list speaks for itself. It confirms that the federal executive  
has been empowered to designate and has whatever intra-provincial activities it unilaterally  
decides to include in the project list. However, the federal government does not have a free-  
standing right to require an environmental assessment of every intra-provincial activity in this  
country that it wishes. It must have some valid decision-making authority over the activity itself  
apart from the environmental assessment.133  
(ii)  
Need for Federal Decision-Making Authority Linked to Federal Head of  
Power  
[219] In Oldman River at 47, La Forest J recognized the significance of, and rationale for, the  
existence of an affirmative regulatory duty to trigger the federal environmental review process:134  
That is not to say that the Guidelines Order is engaged every time a  
project may have an environmental effect on an area of federal  
jurisdiction. There must first be a “proposal” which requires an  
“initiative, undertaking or activity for which the Government of  
Canada has a decision making responsibility.... In my view the  
proper construction to be placed on the term “responsibility” is that  
the federal government, having entered the field in a subject matter  
assigned to it under s 91 of the Constitution Act, 1867, must have an  
affirmative regulatory duty pursuant to an Act of Parliament which  
relates to the proposed initiative, undertaking or activity. It cannot  
have been intended that the Guidelines Order would be invoked  
every time there is some potential environmental effect on a matter  
of federal jurisdiction.135 [Underline in original; italics added]  
[220] Thus, Oldman River has been described as making it “a principle of federal [environmental  
assessment] that its triggers needed to be tied to federal regulatory decision-making” and that while  
federal assessment is “constitutionally justified in a stand-alone way as an information gathering  
133  
Even then, the environmental effects to be studied may be limited to those which may have an impact on the areas  
of federal responsibility affected, a point to which we return later.  
134  
The project in Oldman River, a dam, was said to trigger the Guidelines Order because the Navigable Waters  
Protection Act placed an affirmative regulatory duty on the Minister of Transport whose approval was required for  
any work substantially interfering with navigation. The Minister of Transport had granted the approval, subject to  
conditions, without subjecting the application to an assessment under the Guidelines Order.  
135  
La Forest J added at 48: “In my view the Navigable Waters Protection Act does place an affirmative regulatory  
duty on the Minister of Transport. Under that Act there is a legislatively entrenched regulatory scheme in place in  
which the approval of the Minister is required before any work that substantially interferes with navigation may be  
placed in, upon, over or under, through or across any navigable water” (emphasis added).  
Page: 71  
process”, it otherwise needed to relate to “specific headings of federal constitutional authority that  
had existing legislative and regulatory controls”.136  
[221] In Moses c Canada (Procureur général), 2008 QCCA 741 [Moses CA] (varied on other  
grounds in Moses SCC), the Quebec Court of Appeal addressed what could appropriately trigger  
a federal environmental assessment, in that case under CEAA 1992. Quebec had argued that no  
environmental review was required for a fish permit under CEAA 1992; Canada contended that  
CEAA 1992 had modified the environmental review process. The Quebec Court of Appeal  
concluded that CEAA 1992 was broader in scope than the Guidelines Order in that it provided for  
an environmental review whenever a federal permit, license or approval was required for the  
purpose of enabling the project to be carried out. It stressed though at para 63:  
Even more fundamentally, it should be recalled that environmental  
statutes (shared jurisdiction) are constitutionally valid as long as  
they remain accessory to the exercise of a (federal or [provincial])  
legislative jurisdiction and that, generally speaking, such statutes  
must be closely related to the jurisdiction to be exercised. In  
contrast, such statutes may not in themselves serve as a pretext to  
invade the jurisdictional field of another level of government.  
[222] We do not agree that Moses CA eliminated the need for a federal decision-making authority  
as the trigger for a federal environmental assessment. What Moses CA said was that given the  
broader wording of CEAA 1992, which required an environmental assessment whenever there was  
a need for a federal permit, license or approval, that was sufficient to trigger the federal review  
process whereas under the Guidelines Order, that review was only required where there was a  
“positive obligation under federal legislation to regulate in relation to a proposed undertaking or  
activity”: Moses CA at para 102.137 This distinction flows from the different wording of the  
enabling legislation. What the Quebec Court of Appeal did not do is approve the validity of a  
federal environmental review of an intra-provincial activity absent a federal decision-making  
authority with respect to that activity under a federal head of power.  
[223] Recently, in Attorney General of Quebec v IMTT-Québec inc., 2019 QCCA 1598, leave  
to appeal to SCC refused, 38929 (16 April 2020), the Quebec Court of Appeal again underscored  
the need for the existence of a decision-making authority under otherwise valid legislation as a  
trigger for environmental review by either level of government. It specifically endorsed at para  
225 La Forest J’s remarks in Oldman River about the need for an affirmative regulatory duty as  
136  
Northey at 245-246.  
137  
It was this change in the scope of when an environmental review would be required that led to a different result  
from Oldman River vis à vis the Fisheries Act. La Forest J found at 49 that: “Whereas the Minister of Transport is  
responsible under the terms of the Navigable Waters Protection Act in his capacity as regulator, the Minister of  
Fisheries and Oceans under s. 37 of the Fisheries Act has been given a limited ad hoc legislative power which does  
not constitute an affirmative regulatory duty.”  
Page: 72  
being “just as applicable to provincial environmental impact assessment and review schemes,  
which will validly be applied only if the province has an affirmative constitutional regulatory duty  
with respect to the undertaking or activity in question”. It then added at paras 226-227:  
[A]n environmental assessment is not an end in and of itself. It is a  
decision-making tool. If a level of government has no decision-  
making jurisdiction with respect to a project or an activity, an  
environmental assessment carried out by that level of government  
would be futile. It would also be unconstitutional. Thus, it is not the  
responsibility of the Government of Quebec to assess a project or  
activity under exclusive federal jurisdiction unless it must exercise  
decision-making authority over the project or activity under a  
constitutionally valid, applicable and operative provincial statute.  
The same principle applies to the federal government with respect  
to a project or activity under exclusive provincial jurisdiction. The  
equilibrium of Canada’s constitutional order depends on it.  
Consequently, one level of government cannot engage in an  
environmental assessment of a project unless the project requires  
the authorization of that government based on a constitutional  
power or unless the other level of government consents. [Emphasis  
added]  
[224] Thus, a federal environmental assessment of an intra-provincial activity otherwise within  
exclusive provincial jurisdiction must be tied to a constitutional decision-making authority over  
that activity independent of the environmental assessment itself. Under the Guidelines Order, that  
authority was the existence of an affirmative regulatory duty. Under CEAA 1992, that authority  
was the requirement for a federal permit. These semantical distinctions are irrelevant. What is  
relevant is whether some federal decision-making authority exists with respect to the intra-  
provincial designated project, regardless of what it is labelled. The requirement for a decision-  
making authority under a valid and applicable federal statute independent of the environmental  
assessment evinces and establishes federal jurisdiction. The absence of such a decision-making  
authority demonstrates the opposite.  
[225] Under this legislative scheme, the designation of an intra-provincial activity is not  
contingent on the existence of a federal decision-making authority over that activity.138 Nor is the  
138  
We recognize that, in the absence of a pre-existing decision-making authority, legislation authorizing an  
environmental impact assessment of an intra-provincial activity could itself prescribe the scope of a decision-making  
authority under specific federal heads of power. Such legislation would need to specify the parameters of federal  
regulation of aspects of that intra-provincial activity on terms that would survive constitutional challenge. But the IAA  
contains no legislative regulations relating to fisheries, species at risk, migratory birds or “Indians, and Lands reserved  
for the Indians” with respect to intra-provincial designated projects. Parliament already has legislation on these subject  
matters.  
Page: 73  
public interest determination. However, since there is no public interest determination head of  
power, that public interest determination, along with the imposition of conditions and decision  
statement relating thereto, must be linked to the exercise of a decision-making authority under a  
constitutionally valid and applicable federal statute. It is not.  
[226] Parliament’s failure to limit the IAA to intra-provincial designated projects that require a  
federal permit or some other decision-making authority under a federal head of power constitutes  
federal jurisdictional overreach.  
b.  
Regulation of Any and All Effects of Intra-Provincial Designated Projects  
[227] Instead of grounding review of impact assessments of intra-provincial designated projects  
in federal decision-making under federal heads of power, Parliament has imposed a review and  
regulatory regime based on all the effects of such projects. As a result, the IAA is not limited to the  
environmental effects of an intra-provincial designated project on a matter actually within federal  
competence.  
[228] There are three aspects to this facet of federal overreach vis à vis intra-provincial  
designated projects. First, Parliament’s self-defined “effects within federal jurisdiction” under the  
Act, as with the related “adverse effects within federal jurisdiction”, are not all within federal  
jurisdiction. Second, the effects are not all validly linked to a federal head of power. In this regard,  
the legislative scheme regulates all effects of an intra-provincial designated project even though  
all are not sufficiently linked to any federal decision-making authority or are merely incidental to  
the exercise of a provincial head of power or are not even significant. Third, on top of this, the  
public interest determination by the federal executive is not even limited to the “effects” of  
designated projects but also includes mandatory factors that themselves are not all validly linked  
to a federal head of power.  
(i)  
Self-Defined “Effects Within Federal Jurisdiction” Are Not All Within  
Federal Jurisdiction  
[229] When applied to intra-provincial designated projects, not all the self-defined “effects  
within federal jurisdiction” are within federal competence. It must be borne in mind that the  
starting point is that provincial Legislatures have primary jurisdiction over intra-provincial  
designated projects. Parliament’s jurisdiction is limited to the effects of those projects on federal  
heads of power. Thus, Parliament has no constitutional right to regulate those projects from  
beginning to end. Federal regulation is restricted to the effects of those projects on actual federal  
heads of power.  
[230] Take for example “a change to the environment that would occur in a province other than  
the one” where the intra-provincial designated project is being carried out: Act, s 7(1)(b)(ii). Given  
the broad sweep of this legislative scheme, that includes a change to the environment from GHG  
emissions from intra-provincial designated projects. Indeed, Canada asserts its right to control  
Page: 74  
GHG emissions from those projects based on the national concern doctrine. But as we explain  
later, GHG emissions generally, and from intra-provincial designated projects in particular, do not  
fall within Parliament’s jurisdiction.  
[231] Another example – “any change occurring in Canada to the health, social or economic  
conditions of the Indigenous peoples of Canada”: Act, s 7(1)(d). Again, as explained later,  
Parliament’s jurisdiction under s 91(24), when applied to intra-provincial designated projects, does  
not include all changes caused by such projects to, for example, the economic conditions of an  
Indigenous group. Nor does it entitle Parliament to exercise wholesale regulatory control over  
intra-provincial designated projects on the basis of an impact resulting from “any change to the  
environment” from such projects on “the current use of lands and resources for traditional  
purposes”: Act, s 7(1)(c)(ii).  
(ii)  
Federal Jurisdiction Does Not Extend to Any and All Effects of Intra-  
Provincial Designated Projects  
[232] Parliament has empowered the federal executive to use any and all effects, environmental  
and otherwise, from an intra-provincial designated project in deciding whether to make a positive  
public interest determination, that is whether the project is in the public interest. However,  
Parliament’s attempt to use all effects of an intra-provincial designated project in regulating and  
prohibiting that project from proceeding cannot succeed. It runs counter to long-standing precedent  
and has far-reaching negative implications for federalism and the division of powers. Simply put,  
Parliament does not have the constitutional jurisdiction to regulate intra-provincial designated  
projects from inception to completion merely because they may, or will, have some effects on a  
matter otherwise within federal jurisdiction.  
[233] First, the pith and substance of the federal legislation must be sufficiently connected to a  
federal head of power. Using the fisheries as an example, if the pith and substance of federal  
legislation is not sufficiently connected to protection of fisheries, it will not be valid: Fowler v The  
Queen, [1980] 2 SCR 213 at 226 [Fowler].139 In Fowler, the Supreme Court characterized the  
impugned section of the Fisheries Act, RSC 1970, c F-14 as seeking to control certain kinds of  
operations not strictly on the basis they have deleterious effects on fish but, rather, on the basis  
that they might have such effects. It concluded at 226 that the broad prohibition, which was not  
linked to actual or potential harm to fisheries, was not necessarily incidental to the federal power  
to legislate in respect of sea coast and inland fisheries and was ultra vires.  
139  
In Fowler, the Supreme Court found a provision enjoining the deposit of slash, stumps or other debris into water  
frequented by fish ultra vires Parliament since it was not validly linked to any actual or potential harm to fisheries.  
But in Northwest Falling Contractors Ltd. v The Queen, [1980] 2 SCR 292, the Supreme Court found a provision  
prohibiting the deposit of deleterious substances in any place where they might enter waters frequented by fish intra  
vires under s 91(12) of the Constitution Act, 1867. La Forest J pointed out the distinction between these two cases in  
Oldman River at 68.  
Page: 75  
[234] Under the IAA however, there is no requirement that the effects of an intra-provincial  
designated project must be linked to actual or likely harm to the fisheries (or another matter within  
a federal head of power) such that a federal permit would be required for the project to proceed.  
As noted, there is no requirement that an intra-provincial designated project even need a federal  
permit as an entry point into this assessment and regulatory regime. Thus, the “effects” from intra-  
provincial designated projects are not limited to “direct or incidental effects” that would, in turn,  
give rise to the need for a federal permit for the project. That is obvious from the Act which  
explicitly distinguishes between “direct or incidental effects” linked to a federal permit, which are  
within Parliament’s jurisdiction and are addressed under s 8, and self-defined “effects within  
federal jurisdiction”, which are not all within Parliament’s jurisdiction and are addressed under  
s 7.  
[235] In the result, this legislative scheme is not limited to protecting against adverse effects on  
matters within federal competence that would meet the constitutional test for federal regulation of  
aspects of intra-provincial designated projects.  
[236] Second, even if the effects of an intra-provincial designated project are linked to a federal  
head of power, there is no requirement under this legislative scheme that the effects even be  
significant before the federal executive can deny a positive public interest determination and  
effectively end the project. Neither the impact assessment nor public interest determination and  
related decision-making elements are limited to protecting against significant adverse  
environmental effects as claimed in the long title of the Act.  
[237] Prior to the Act, every version of federal environmental assessment legislation required that  
adverse effects on matters within federal jurisdiction be significant to warrant federal regulation  
of some aspect of the project. For example, the stated purposes of CEAA 1992 included preventing  
significant adverse environmental effects: CEAA 1992, s 4(1)(a).140 And the first stated purpose in  
CEAA 2012 was “to protect the components of the environment that are within the legislative  
authority of Parliament from significant adverse environmental effects caused by a designated  
project”: CEAA 2012, s 4(1)(a), emphasis added.  
[238] That purpose in CEAA 2012 was reflected in its relevant substantive provisions. Under  
CEAA 2012, the federal government’s decision whether to issue a positive decision statement and  
set out any conditions a proponent must meet was directly related to whether the proposed project  
was likely to cause significant adverse environmental effects and even if it did, whether those could  
nevertheless be “justified in the circumstances”: CEAA 2012, ss 52-54. In other words, CEAA 2012  
essentially contemplated that a positive decision statement would be forthcoming if the project  
was not likely to cause significant adverse effects on a matter actually related to a federal head of  
power and even if it was likely to cause significant adverse effects, if it could nevertheless be  
140  
The Guidelines Order did not contain a purpose provision. The stated purposes of CEAA 1992 included considering  
projects in a precautionary manner and promoting sustainable development: CEAA 1992, s 4(1)(a)-(b).  
Page: 76  
justified in the circumstances. Accordingly, CEAA 2012 had a materiality threshold (significant)  
for adverse federal effects built into it.141  
[239] However, the Act includes no materiality threshold in the federal executive’s public interest  
determination or decision statement relating thereto. Instead, under the Act, the requirement for a  
materiality threshold, significant adverse effects, is gone. It is now a stated purpose “to protect the  
components of the environment, and the health, social and economic conditions that are within the  
legislative authority of Parliament from adverse effects caused by a designated project”: Act,  
s 6(1)(b), emphasis added.142  
[240] It is true that under s 28(3) of the Act, the Agency must set out in its Report the effects that  
are “likely to be caused by the carrying out of the designated project” and “the extent to which  
those effects are significant”. And a review panel must do likewise under s 51(1)(d)(i)-(ii) of the  
Act. But the parameters for the public interest determination by the Minister or Governor in  
Council do not include a materiality threshold. While ss 60(1)(a) and 62 both require the Minister  
or Governor in Council to take into account the Report and the adverse federal effects indicated  
therein and to consider the extent to which any adverse federal effects are significant in making a  
public interest determination, there is no requirement that any purported adverse federal effects  
actually be significant. To the contrary. The explicit reference to considering the “extent” to which  
adverse federal effects are “significant” makes it clear that they need not be significant. In other  
words, if the adverse federal effects are not significant, there is no requirement that the Minister  
or Governor in Council must make a positive public interest determination.143  
[241] In the result, the Act allows the federal executive to stop any intra-provincial designated  
project whenever there are any adverse federal effects of that project on the components of the  
environment even where no federal permit is required and even where such effects are not even  
141  
So too did CEAA 1992. It provided that the Minister “shall” issue an environmental assessment decision statement  
setting out the Minister’s opinion whether the “project is or is not likely to cause significant adverse environmental  
effects”: CEAA 1992, s 23(1)(a). It too contemplated that the responsible authority would permit the project to be  
carried out where it was not likely to cause significant adverse environmental effects or, even if it was likely to cause  
significant adverse environmental effects, where those effects could be justified in the circumstances: s 37(1)(a).  
142  
Nor is there any requirement that there even be likely adverse effects before the Agency directs that an impact  
assessment proceed. The “possibility that the carrying out of the designated project may cause adverse effects within  
federal jurisdiction or adverse direct or incidental effects” is but one of the seven factors to be considered, and even  
this low standard is not a prerequisite: Act, s 16(2)(b), emphasis added.  
143  
The IAA appears to assume there will inevitably be effects which qualify as adverse federal effects. It fails to  
address what would occur if the Agency, review panel, Minister or Governor in Council after an assessment concluded  
there were no adverse federal effects from a designated project. The Agency (s 28(3)) and review panel (s 51(1)(d))  
are directed to indicate the adverse federal effects in their respective Reports and appear to be required to submit those  
Reports even if no such effects are identified. The decision statement (s 65) does not contemplate a decision that there  
are no adverse federal effects. While it might be suggested it is “implied” that a decision statement would be issued  
with no conditions, it is telling that this prospect is not even contemplated.  
Page: 77  
significant. This would include any adverse federal effects not prohibited under any existing  
federal law.  
[242] Third, if the federal executive could prohibit an intra-provincial designated project from  
proceeding simply because its effects may have some impact on a matter within a federal head of  
power, this would negate a key element of the pith and substance doctrine. Under the pith and  
substance doctrine, one level of government may validly legislate on matters within its jurisdiction  
in a manner that causes incidental effects on matters within the jurisdiction of the other level of  
government: Canadian Western Bank at paras 28-29; Hogg at §15:5. Therefore, if the pith and  
substance of a law is within a head of power assigned exclusively to the provinces, the fact the law  
may have incidental effects – which could involve a “substantial impact” – on a head of power  
within exclusive federal jurisdiction is irrelevant for constitutional purposes: ibid.; General  
Motors of Canada Ltd. v City National Leasing, [1989] 1 SCR 641 at 670 [General Motors];  
Quebec (Attorney General) at para 32; Rogers Communications at para 37; Paul at para 14.  
[243] It is equally irrelevant where a provincial law, authorizing, for example, a local work and  
undertaking on terms and conditions set by the provincial government, has incidental effects on  
something over which the federal government does not have exclusive jurisdiction, namely the  
environment. Almost every activity in life affects the environment in some way. “[E]nvironmental  
pollution alone is itself all-pervasive. It is a by-product of everything we do. In man’s relationship  
with his environment, waste is unavoidable.” 144 It would be ironic indeed if the federal  
government could use the “environment” to shove aside the power of provincial governments to  
authorize and regulate intra-provincial activities where the federal government could not use  
incidental effects of a provincial law on an actual head of exclusive federal power to do so. Thus,  
the fact a provincial law under which intra-provincial activities are authorized may have some  
incidental effects on the environment, which is not a federal head of power, but merely related to  
a federal head of power, is also constitutionally irrelevant.  
[244] Were Parliament permitted to prohibit “all effects” on its heads of power flowing from an  
activity authorized by a provincial Legislature under valid provincial laws, that would effectively  
prohibit that authorized activity.145 For example, if a federal law prohibiting “any effects” on  
banks were constitutionally valid, banking being within exclusive federal jurisdiction under s  
91(15) of the Constitution, that could insulate banks from provincial taxation (upheld in Bank of  
Toronto v Lambe (1887), 12 App Cas 575 (PC)) and provincial rules for selling insurance (upheld  
in Canadian Western Bank). This would defeat the principle that valid provincial legislation can  
authorize an activity which has incidental effects on matters within federal jurisdiction.  
[245] To be clear, in regulating “all effects” of an intra-provincial designated project, Parliament  
is regulating the project itself. The effects of an intra-provincial designated project do not arise,  
nor exist, in a vacuum. They are tied to one thing and one thing only the project itself.  
144  
Crown Zellerbach at 455, per La Forest J.  
145  
And vice versa.  
Page: 78  
Substantively, this legislative scheme regulates not only effects, but the physical activity giving  
rise to the effects, that is the intra-provincial designated project. Of course, under the IAA,  
Parliament has not regulated every aspect of the project. But federal regulatory authority  
necessarily extends to the project itself since Parliament has given the federal executive the  
ultimate regulatory club an effective veto over every intra-provincial designated project. That  
veto is the apex of regulation. It is evidenced by the necessity for a positive public interest  
determination by the federal executive before a proponent can effectively proceed with an intra-  
provincial designated project. No positive public interest determination equals no project.  
[246] What Parliament has done under the IAA is to use what may well be no more than incidental  
effects of provincial legislation (under which such intra-provincial designated projects are  
authorized) on federal heads of power, or more problematic yet, incidental effects of provincial  
legislation on the environment, which is not a federal head of power, to justify legislation that  
directly invades provincial jurisdiction. This turns the incidental effects doctrine upside down.146  
[247] Canada’s submission that “any” potential effects on a matter within its jurisdiction justifies  
a full impact assessment and regulation of matters otherwise within provincial jurisdiction is also  
inconsistent with its position in Environmental Management Act BCCA.147 In that case, Canada  
challenged amendments to British Columbia’s Environmental Management Act, SBC 2003, c 53.  
The purpose of that legislation was described at para 38 as “the protection of the environment, the  
health and well-being of British Columbians and their communities from the adverse effects of  
hazardous substances, and the implementation of the ‘polluter pays’ principle”.  
[248] Canada successfully argued the legislation was ultra vires to the extent it “would  
effectively lead to a situation of concurrent jurisdiction, contrary to the exclusive authority  
contemplated by the Constitution Act”, with respect to an interprovincial undertaking subject to  
federal jurisdiction: para 3, emphasis in original. Canada contended the National Energy Board  
Act, RSC 1985, c N-7 and related statutes “constitute a comprehensive and integrated scheme for  
the regulation of interprovincial pipelines, and environmental protection is a key part of that  
scheme”: ibid. While Canada sought to distinguish Environmental Management Act BCCA as  
legislation targeting the TMX pipeline, that was not the basis of the judgment of the British  
Columbia Court of Appeal. Indeed, that Court specifically indicated at para 97 that the impugned  
legislation was not colourable.  
[249] Alberta, Saskatchewan and Ontario have each passed a “comprehensive and integrated  
scheme” for the regulation of local works and undertakings and the development of their natural  
resources. Environmental protection is a key part of each of their schemes. The IAA leads to  
concurrent jurisdiction with respect to intra-provincial designated projects otherwise subject to  
provincial jurisdiction under provincial heads of power.  
146  
We recognize that an authorized intra-provincial activity may well have effects on a federal head of power such  
that it requires a federal permit. But not all intra-provincial designated projects are in this category.  
147  
This was unanimously upheld by the Supreme Court: 2020 SCC 1.  
Page: 79  
[250] We would add this. If Parliament could validly exercise jurisdiction over matters otherwise  
within provincial jurisdiction because of “any effects” on federal matters, a provincial Legislature  
could presumably validly exercise jurisdiction over matters within federal jurisdiction because of  
“any effects” on provincial matters. The converse of the IAA would be provincial legislation  
authorizing the province to designate projects (including those which fall within federal  
jurisdiction such as an airport or inter-provincial pipeline) and subjecting them to a multi-year  
environmental review process to determine if there might be any adverse effects on matters within  
provincial jurisdiction and, in the meantime, prohibiting any effects unless the project is found to  
be in the public interest based on provincial priorities and policies. On this theory, a provincial  
government would be able to hold up construction of, for example, a new airport or inter-provincial  
pipeline for years pending completion of the review process to determine if the construction might  
have “any effects” on matters within provincial jurisdiction (such as wildlife or property and civil  
rights) and then, if it decided that the project was not in the public interest based on provincial  
policies and priorities, ultimately stop it from proceeding.  
(iii) Public Interest Determination Is Not Limited to Purported Adverse Federal  
Effects  
[251] In addition, in any event, the jurisdiction Canada claims is not even limited only to the  
purported adverse federal effects of intra-provincial designated projects. The Act requires that the  
mandatory factors must be taken into account in both the impact assessment and public interest  
determination phases of this legislative scheme. Section 63 of the Act provides that both the Report  
(which must consider the s 22 mandatory factors) and the s 63 mandatory factors must be taken  
into account in making a public interest determination.148  
[252] However, several of the mandatory factors, when applied to intra-provincial designated  
projects, are not linked to a federal head of power. Take for example, the “need for the designated  
project”: Act, s 22(1)(d). Whether an intra-provincial designated project is needed is for the  
provincial government to decide, not the federal government. Parliament has no head of power  
authorizing it to determine whether an intra-provincial designated project is “needed”.  
[253] Or take for example one of the s 63 mandatory factors, “the extent to which the designated  
project contributes to sustainability”: Act, s 63(a). Sustainability is defined as “the ability to protect  
the environment, contribute to the social and economic well-being of the people of Canada and  
preserve their health in a manner that benefits present and future generations”: Act, s 2. While this  
is within Parliament’s jurisdiction for federal designated projects, that is not so for intra-provincial  
designated projects. Parliament has no head of power giving it the right to authorize the federal  
executive to decide whether an intra-provincial designated project is in the public interest based  
148  
The Report must also take into account “any other matter relevant to the impact assessment that the Agency  
requires to be taken into account”: Act, s 22(1)(t). This potentially expands the scope of a Report to an unlimited  
extent.  
Page: 80  
on whether that project contributes to the social and economic well-being of the people of  
Canada.149 And to effectively put an end to it if the federal executive decides it is not. Indeed, the  
very fact the federal executive is entitled to put on the public interest determination scale whether  
the intra-provincial designated project contributes to the well-being of the people of Canada refutes  
the assertion that the public interest determination for intra-provincial designated projects is not  
based on federal priorities and policies. It most assuredly is.  
[254] Another example is s 63(e), “the extent to which the effects of the designated project hinder  
or contribute to the Government of Canada’s ability to meet its environmental obligations and its  
commitments in respect of climate change”. Again, this does not fall within Parliament’s  
jurisdiction when applied to intra-provincial designated projects.  
[255] As a result, the scope of both the impact assessment and the public interest determination  
permit the federal executive to use not only “any effects” of an intra-provincial designated project  
but also the defined mandatory factors to regulate and ultimately stop an intra-provincial  
designated project from proceeding. This too constitutes federal jurisdictional overreach and is, by  
itself, fatal to this legislative scheme.  
(iv)  
Conclusions  
[256] Parliament’s attempt to use “any effects” and an equally wide range of mandatory factors  
in its oversight and regulation of intra-provincial designated projects raises the very concern  
recognized by La Forest J in Oldman River at 71-72:  
I am not unmindful of what was said by counsel for the Attorney  
General for Saskatchewan who sought to characterize the  
Guidelines Order as a constitutional Trojan horse enabling the  
federal government, on the pretext of some narrow ground of federal  
jurisdiction, to conduct a far ranging inquiry into matters that are  
exclusively within provincial jurisdiction....  
Because of its auxiliary nature, environmental impact assessment  
can only affect matters that are “truly in relation to an institution or  
activity that is otherwise within [federal] legislative jurisdiction”....  
Moreover, where the Guidelines Order has application to a proposal  
because it affects an area of federal jurisdiction ... the environmental  
effects to be studied can only be those which may have an impact on  
the areas of federal responsibility affected. [Emphasis added]  
149  
It is for the relevant provincial government or provincial authority to determine whether an intra-provincial  
designated project is in the best interests of the people of the province involved.  
Page: 81  
[257] It is noteworthy that the Supreme Court’s response to, and dismissal of, the Trojan horse  
concern was based on its conclusions that the environmental impact assessment could only affect  
matters truly in relation to an activity otherwise within federal legislative jurisdiction and that the  
environmental effects to be studied can only be those which may have an impact on the areas of  
federal responsibility affected. Oldman River was not therefore an endorsement of comprehensive  
federal environmental impact assessments of intra-provincial activities otherwise within provincial  
jurisdiction. To the contrary.  
[258] Nor has the Supreme Court in any subsequent decision modified those conclusions from a  
constitutional perspective. We recognize that in Red Chris, the Supreme Court determined that a  
federal authority was required to undertake a comprehensive study of a proposed project, rather  
than simply screening the project. But Rothstein J made it clear at para 27 that the issue before the  
Court was one of statutory interpretation: “The duty of this Court is to interpret the Act based on  
its text and context.” The constitutionality of the legislation in question was not before the Supreme  
Court. Red Chris neither purported to, nor did it, overrule Oldman River regarding the scope of  
federal environmental impact assessments for intra-provincial activities.  
[259] Duplication of comprehensive environmental impact assessments arguably creates a  
jurisdictional nightmare for proponents of intra-provincial designated projects. While their  
perspective is not relevant to the division of powers, what is relevant are the consequences  
potentially flowing therefrom for the provincial governments that would otherwise have exclusive  
jurisdiction over those projects, namely constitutional gridlock and improper intrusion into  
provincial jurisdiction. We appreciate the arguments in favour of comprehensive environmental  
impact assessments. However, while every activity in this country is subject to federal or  
provincial jurisdiction or sometimes both, there being no gap in constitutional powers, one  
government level typically has primary jurisdiction over an activity. For intra-provincial  
designated projects, that would be the provincial government. And since all provincial  
governments have comprehensive environmental impact assessment legislation in place, as a  
practical matter, the relevant provincial government can be counted on to conduct a comprehensive  
environmental impact assessment. Thus, as a further practical matter, that comprehensive  
assessment would be available to both government levels to use for its respective purposes.  
[260] That said, given our view of the degree of federal jurisdictional overreach under this  
legislative scheme, we see no need to explore the issues relating to duplication of comprehensive  
environmental impact assessments. In particular, we do not find it necessary to consider whether  
the federal government has the jurisdiction to compel, as does this legislative scheme, a  
comprehensive impact assessment of every intra-provincial designated project even where the  
effects studied extend beyond the areas of federal responsibility affected by that project.  
[261] One point is clear regardless. Parliament does not have the jurisdiction to take over the  
wholesale regulation of intra-provincial designated projects, especially in the absence of any actual  
decision-making authority with respect to those projects. Accordingly, it does not have the  
jurisdiction to authorize the federal executive to use all effects of an intra-provincial designated  
Page: 82  
project, whether by themselves or in combination with the mandatory factors, to stop the project  
from proceeding if the federal executive decides the project is not in the public interest.  
[262] It follows that we reject the contention that under this legislative scheme, Parliament has  
only regulated what it calls “adverse effects within federal jurisdiction”. We have already  
explained why self-defined “effects within federal jurisdiction” do not all fall within federal  
jurisdiction regardless. Nor does adding the adjective “adverse” to the mix, as in “adverse effects  
within federal jurisdiction”, change this conclusion. Since “adverse” is not even defined in the Act,  
this adjective includes any “adverse” environmental change no matter how insignificant it may  
be.150 But “adverse” effects cannot be equated with the provable “harm” that would be required  
for those effects to actually fall within a federal head of power, for example fisheries. Moreover,  
the prohibitions under the IAA are not even tied to “adverse” effects. Those prohibitions apply  
irrespective of whether the effects of an intra-provincial designated project are positive, neutral,  
or adverse. Thus, the argument that under this legislative scheme, Parliament has regulated only  
“adverse” effects of intra-provincial designated projects “within federal jurisdiction”, irrespective  
of what “adverse” actually means, is simply erroneous.  
[263] We also reject the argument that this legislative scheme merely has an incidental effect on  
provincial powers. The problem here is not with the incidental effects of this legislative scheme;  
the problem is with its main thrust: First Securities Reference at para 129. This legislative scheme  
regulates intra-provincial designated projects from beginning to end. Further, even where the  
effects of an intra-provincial project truly affected a matter within one of Parliament’s heads of  
power, its jurisdiction is limited to the consequences of those effects on that head of power.  
Parliament does not have jurisdiction over all effects, environmental and otherwise, of intra-  
provincial designated projects not linked at all, or not sufficiently linked, to federal heads of power,  
much less the right to authorize the federal executive to effectively veto all intra-provincial  
designated projects based on its unilateral determination that the project is not in the public interest.  
[264] If Parliament had that kind of unbridled power, it would eviscerate provincial legislative  
competence. No federal head of power should be given a scope that would lead to this result: First  
Securities Reference at para 71; References re Greenhouse Gas Pollution Pricing Act SCC at  
para 49.  
c.  
Prohibitions Under Section 7 and Federal Jurisdictional Overreach  
[265] Section 7 imposes substantial prohibitions on the proponents of designated projects only.  
The proponent of a designated project, like the proponent of any other project in this country, is  
subject to all federal laws of general application, including all environmental prohibitions and  
150  
Given the breadth of the definitions of “effects” and “effects within federal jurisdiction”, every intra-provincial  
designated project will invariably have some “adverse effects within federal jurisdiction”. In fact, this legislative  
scheme does not even contemplate what would occur if the Agency, review panel, Minister or Governor in Council  
concluded there were no such adverse effects.  
Page: 83  
regulations. Under those laws, necessary federal approvals or permits must be obtained to enable  
the project to proceed.  
[266] The IAA, however, imposes additional prohibitions and related sanctions specifically and  
exclusively on the proponents of designated projects. Proponents of intra-provincial designated  
projects are prohibited from doing any act or thing that may cause any of the “effects” listed in  
s 7(1).151 The result is that proponents of intra-provincial designated projects are prohibited from  
engaging in conduct that is permissible for others and which is not otherwise prohibited by laws  
of general application and for which they alone are exposed to substantial penalties unless and  
until a positive public interest determination is made.  
[267] There were no prohibitions under the Guidelines Order which was procedural rather than  
substantive in nature.152 Thus, project proponents were not subject to additional prohibitions not  
applicable to anyone else in Canada merely because they were the proponent of a project. Under  
CEAA 1992, a Minister could, by order, prohibit a proponent from doing any act or thing that  
would alter the environment: CEAA 1992, s 11.1(1). However, any prohibition under CEAA 1992  
was not automatic but rather required a positive action to make an order. Further, the prohibition  
applied only to acts or things that would, not might, alter the environment.  
[268] CEAA 2012 first introduced the concept of an automatic prohibition into federal  
environmental assessment legislation. It provided that a proponent of a project must not cause  
certain listed effects unless the project did not require an assessment or the proponent complied  
with conditions in a decision statement: CEAA 2012, s 6. As noted though, that scheme was  
fundamentally different in a number of crucial constitutional respects from this one and its  
constitutionality was never challenged by a province.  
[269] Contravening s 7 of the Act is a summary conviction offence, but subject to substantial  
penalties.153 The maximum fine for contravening the prohibition under CEAA 2012 ranged from  
$200,000 to $400,000: CEAA 2012, s 99(1). Under s 144 of the Act, the magnitude of fine has  
increased substantially and can now be up to $8 million per offence per day.154 In addition, the  
151  
The prohibitions apply regardless of whether the effects are positive, neutral or adverse, material, actually linked  
to a federal head of power or have even been the subject of regulation under a federal head of power.  
152  
As stated in Oldman River at 42: “The Guidelines Order establishes an environmental assessment process for use  
by all federal departments in the exercise of their powers and the performance of their duties and functions, whereas  
the Fisheries Act embraces the substantive matter of protecting fish and fish habitat. There is, of course, a connection  
between the two, but the crucial difference is that one is fundamentally procedural while the other is substantive in  
nature” (emphasis added).  
153  
The minimum fine for a first offence and range for subsequent offences, respectively, is $5,000 and $10,000 to  
$600,000 for an individual; $25,000 and $50,000 to $4 million for a small revenue corporation; and $100,000 and  
$200,000 to $8 million for any other corporation: Act, s 144.  
154  
Where offences are committed or continue on more than one day, that constitutes a separate offence for each day,  
meaning the fine can be imposed per day: Act, s 146(1).  
Page: 84  
Act makes any senior officer of a corporation, as defined in s 2 of the Criminal Code, who directed,  
authorized, assented to or acquiesced in the commission of the offence a “party to and guilty of  
the offence”: s 147. It also imposes on every senior officer the obligation to “take all reasonable  
care to ensure that the corporation” complies with the Act: s 148.  
[270] The result is that both the prohibited effects and offences under the Act are broader in scope,  
the personal jeopardy greater for senior officers of corporations and the fines prohibitive. It is  
understandable therefore why no senior officer of a corporation would ever proceed with an intra-  
provincial designated project without federal approval through a positive public interest  
determination and decision statement setting out the conditions for proceeding with that project.  
[271] A review of the specific prohibitions under s 7(1) demonstrates the breadth of their legal  
effects and the extent to which they improperly trench on provincial powers.  
(i)  
Prohibitions on Changes to Particular Components of the Environment  
Changes to Fish and Fish Habitat and Aquatic Species  
[272] Existing legislation under s 91(12) of the Constitution Act, 1867 regarding the fisheries  
addresses specific issues or concerns in relation to fish, fish habitat and aquatic species at risk.  
Both the Fisheries Act and Species at Risk Act, SC 2002, c 29 [Species at Risk Act] provide criteria,  
identify objectives and impose sanctions. The IAA contains no such provisions in relation to fish,  
fish habitat or species at risk. Instead, the proponent of a designated project is prohibited from  
causing any change to fish and fish habitat and aquatic species: Act, s 7(1)(a)(i) (fish and fish  
habitat), s 7(1)(a)(ii) (aquatic species). The legal effect of these sections is that the proponent of  
an intra-provincial designated project is prohibited from conduct that may cause any effects to fish,  
fish habitat and aquatic species even where Parliament has not seen fit to regulate or require a  
federal permit for the subject conduct.  
[273] Where the true purpose is protection of fisheries, federal legislation will be valid despite  
having an incidental effect on property interests or development of natural resources in a province:  
Moses SCC at para 36. However, this legislative scheme is far removed from Moses SCC where  
the Supreme Court confirmed that while a vanadium mining project fell within provincial  
jurisdiction under s 92A, “a mining project anywhere in Canada that puts at risk fish habitat could  
not proceed without a permit from the federal Fisheries Minister, which he or she could not issue  
except after compliance with the CEAA.” To repeat, the need for a federal permit is not a  
prerequisite to an intra-provincial activity being designated as an intra-provincial designated  
project under the IAA.  
[274] Under the IAA, the proponent of an intra-provincial designated project is prohibited from  
doing any act that could have any effect on fish and fish habitat.155 If Parliament added an offence  
155  
Currently, the Fisheries Act prohibits any person from carrying on any work, undertaking or activity “other than  
Page: 85  
to the Fisheries Act prohibiting any person from engaging in any conduct that could have any effect  
on fish or fish habitat, or passed a new law to this effect, both would, given Fowler, be ultra vires.  
But the proponents of intra-provincial designated projects are subject to this very prohibition  
throughout the IAA process and indefinitely unless the federal executive makes a positive public  
interest determination. The fact the prohibition is subsumed in the IAA as part of an even more  
expansive prohibition does not make it any less unconstitutional. Proponents of designated projects  
alone are prohibited from engaging in conduct which is permissible for everyone else based on a  
prohibition that would be ultra vires Parliament had it directly regulated such conduct by a law of  
general application.156  
[275] For example, s 92A(1)(c) of the Constitution Act, 1867 provides that provinces have  
exclusive jurisdiction to make laws in relation to the “development, conservation and management  
of sites and facilities in the province for the generation and production of electrical energy”. A  
new intra-provincial hydroelectric generating facility is a designated project and subject to the IAA  
unless it has a production capacity of less than 200 MW: Regulations Schedule, s 42(a). The  
proponent of a new hydroelectric generating facility below the 200 MW threshold (and not  
therefore included as a designated project) could cause adverse effects on fish or fish habitat to the  
extent they were not otherwise prohibited or regulated under the Fisheries Act. But a proponent of  
a new hydroelectric generating facility with a capacity of 200 MW or more which would cause  
less significant adverse effects on fish or fish habitat (for example, because it employed more  
sophisticated technology) could be indefinitely prohibited from proceeding based on a  
determination by the federal executive that the project was not, despite those lesser effects, in the  
“public interest”. The result – proponents of intra-provincial designated projects can be indefinitely  
prohibited from causing the same or lesser adverse effects on the environment than are permitted  
to be caused by similar non-designated projects.  
[276] The differing consequences underscore the federal overreach and demonstrable lack of  
connection of the IAA to a federal head of power. They reveal that the true purpose of the IAA is  
not to prevent adverse environmental effects on matters actually within federal jurisdiction but  
rather to regulate intra-provincial designated projects and veto those which the federal executive  
does not consider to be in the public interest based on federal priorities and policies.  
[277] Parliament does not have exclusive jurisdiction over every effect on every fish caused by  
an intra-provincial designated project in Canada; its head of power is over the fisheries. That means  
regulation of the fisheries through preservation of fish and their environment: Hogg at §30:26.  
Hence, the mere fact there may be an “effect” of an intra-provincial designated project on some  
fish somewhere does not, by itself, entitle the federal executive to “prohibit” that project from  
fishing, that results in the death of fish” (s 34.4(1)) or “that results in the harmful alteration, disruption or destruction  
of fish habitat” (s 35(1)), subject to specified exceptions including the issuance of a permit by the Minister.  
156  
This is an example of “effects” that fall within the scope of the self-defined “effects within federal jurisdiction”  
for purposes of the Act but are not sufficiently linked to a federal head of power and thus are not effects within federal  
jurisdiction for purposes of the Constitution.  
Page: 86  
proceeding where the project does not otherwise require a federal permit under valid federal  
legislation.  
Changes to Migratory Birds  
[278] Canada relies on its jurisdiction under s 132 of the Constitution Act, 1867 to anchor the  
prohibition in s 7(1)(a)(iii) relating to designated projects that cause, or may cause, any effects on  
migratory birds and the ability of the federal executive to decide whether intra-provincial  
designated projects which have any adverse effects on migratory birds should be allowed to  
proceed. Section 132 provides that:  
The Parliament and Government of Canada shall have all Powers  
necessary or proper for performing the Obligations of Canada or of  
any Province thereof, as Part of the British Empire, towards Foreign  
Countries, arising under Treaties between the Empire and such  
Foreign Countries. [Emphasis added]  
[279] The treaty Canada relies on is the 1916 Convention for the Protection of Migratory Birds  
in Canada and the United States made between the British Empire and the United States which  
was implemented in The Migratory Birds Convention Act, SC 1917, c 18. A later amendment to  
the Convention was implemented in the Migratory Birds Convention Act, 1994, SC 1994, c 22  
[Birds Act], which is referenced in s 7(1)(a)(iii) of the Act.157 The Birds Act contains broad  
prohibitions against being in possession of a migratory bird or nest, or making them subject to a  
commercial transaction without lawful excuse: s 5. Similarly, no person or vessel (broadly defined  
as a boat, ship, etc.) can deposit (broadly defined as discharging, spraying, releasing, etc.) a  
substance that is harmful to migratory birds in “waters or an area frequented by migratory birds  
or in a place from which the substance may enter such waters or such an area”: s 5.1(1).158  
[280] The Birds Act also confers broad authority on the Governor in Council to “make any  
regulations” considered “necessary to carry out the purposes and provisions” of the Birds Act and  
Convention, including providing time periods and areas in which migratory birds can be captured,  
killed or taken, their nests can be damaged, destroyed, etc., or become subject to a commercial  
transaction: s 12(1)(a)-(d).159  
157  
The Convention was amended by the “Protocol Between the Government of Canada and the Government of the  
United States of America Amending the 1916 Convention Between the United Kingdom and the United States of  
America for the Protection of Migratory Birds in Canada and the United States” signed on December 14, 1995. See  
Factum of the Attorney General of Canada at paras 113-116.  
158  
Other prohibitions include destroying information or documents required under the Act: s 5.2.  
159  
Regulations may be made “for granting permits to remove or eliminate migratory birds or nests where it is  
necessary to do so to avoid injury to agricultural interests or in any other circumstances set out in the regulations” and  
“respecting the issuance, renewal, revocation and suspension of permits”: s 12(1)(e)-(f).  
Page: 87  
[281] The prohibition in s 7(1)(a)(iii) suffers from the same defects as a law that prohibits “any  
effects” on fish. The constitutionally impermissible over-breadth of this prohibition is  
demonstrated by its application to intra-provincial designated projects that may cause any effects  
on migratory birds regardless of whether those effects are material or the subject of prohibitions  
under the Birds Act or whether the project even requires a permit under the Birds Act.  
(ii)  
Prohibitions on Changes on Federal Lands, Outside the Province or Outside  
Canada  
[282] The proponent of a designated project is prohibited from doing any act or thing that may  
cause any changes to the environment that would occur on federal lands (Act, s 7(1)(b)(i)) or in a  
province other than the one in which the act or thing is done (Act, s 7(1)(b)(ii)) or outside Canada  
(Act, s 7(1)(b)(iii)).  
[283] Canada suggests that this type of regulation is not new and that CEAA 1992 permitted the  
Minister to refer a matter for environmental assessment if of the opinion that the project could  
cause significant adverse environmental effects in another province. However, the Act is not  
limited to significant adverse environmental effects that occur in another province since  
s 7(1)(b)(ii) prohibits any change to the environment that would occur outside a province  
regardless of its materiality.160  
[284] What Parliament is attempting to do is use any possible change to the environment that  
would be anything in the entire biosphere given the definition of environment on federal lands  
or outside the province or outside Canada from an intra-provincial designated project wholly  
within a province to justify regulation of that project.161 Again, this is no more constitutionally  
valid than a law that prohibits any effects on banks or fish.  
Why the National Concern Doctrine Does Not Include Regulation of GHG Emissions  
[285] Canada defends the prohibitions in s 7(1)(b)(ii)-(iii) on the basis of the national concern  
doctrine. Parliament’s regulation of effects from intra-provincial designated projects that occur  
outside the province in which the project is located or outside Canada does not satisfy the three-part  
test under the national concern doctrine.162 In particular, in neither of these cases does the matter  
160  
CEAA 1992 and CEAA 2012 were significantly different in key constitutional respects from the IAA.  
161  
“Environment” is defined under s 2 of the Act as meaning “the components of the Earth, and includes (a) land,  
water and air, including all layers of the atmosphere; (b) all organic and inorganic matter and living organisms; and  
(c) the interacting natural systems that include components referred to in paragraph (a) and (b)”.  
162  
The matter must be (1) “of sufficient concern to the country as a whole to warrant consideration as a possible  
matter of national concern”; (2) “a specific and identifiable matter that is qualitatively different from matters of  
provincial concern” and where there is “provincial inability to deal with the matter”; and (3) the scale of impact must  
be “reconcilable with the division of powers”: References re Greenhouse Gas Pollution Pricing Act SCC at paras  
163-165.  
Page: 88  
have a “scale of impact on provincial jurisdiction that is reconcilable” with the division of powers:  
References re Greenhouse Gas Pollution Pricing Act SCC at para 160. This legislative scheme  
fails this third part of the test.163  
[286] Parliament’s primary target and claimed entry point into regulation of intra-provincial  
designated projects is patent GHG emissions. The federal government has made no attempt to  
conceal its intention on this front. As noted, Parliamentary debates expressly acknowledged GHG  
emissions as a consideration in developing the project list. This goal regulation of GHG  
emissions is also reflected in the mandatory factors that must be taken into account in the impact  
assessment of a designated project. Under s 22(1)(i), the factors include “the extent to which the  
effects of the designated project hinder or contribute to the Government of Canada’s ability to  
meet its environmental obligations and its commitments in respect of climate change”. It is also  
an explicit mandatory consideration in the federal government’s public interest determination: Act,  
s 63(e). And it is reflected as well in ss 32-33 of the Regulations Schedule which exempts in situ  
oil sands facilities in a province from the project list if, but only if, that province has legislated  
GHG emission limits on oil sands sites.  
[287] What this reduces to is this. Where a proposed intra-provincial project in a province would  
emit any GHG emissions and that would necessarily include every proposed intra-provincial  
project in every province Parliament claims the unilateral right to decide whether it will, or will  
not, designate that project and, more important, if designated, whether that project will, or will not,  
proceed. That is the legal effect of s 7(1)(b)(ii)-(iii). Again, this constitutes federal jurisdictional  
overreach.  
[288] This is just another way of Parliament’s seeking to do indirectly what it does not have the  
constitutional right to do directly under the division of powers. That is to regulate GHG emissions  
generally in a province or in individual intra-provincial designated projects, or category thereof,  
in that province. We do not suggest this legislative scheme is colourable. Colourable legislation  
rests on the premise that the true motive of the legislation is something other than its stated purpose.  
But there is no hidden motive in this legislative scheme. Everything is there in plain sight if one  
is prepared to look.  
[289] All three appellate courts that heard the Greenhouse Gas References concluded that the  
federal government did not have the constitutional jurisdiction to regulate GHG emissions in a  
163  
As noted in References re Greenhouse Gas Pollution Pricing Act SCC at para 133: “[A]n onus rests on Canada  
throughout the national concern analysis to adduce evidence in support of its assertion of jurisdiction.” The GGPPA  
satisfied the third part of the test because the federal backstop feature only applied where specific provincial  
deficiencies existed. Conversely, the IAA allows the federal executive to effectively veto an intra-provincial designated  
project despite a province’s full impact assessment, approval and regulation of that project. Canada led no evidence  
to meet the second part of the test either. Regulating the effects of intra-provincial designated projects, including their  
GHG emissions, is not qualitatively different from matters of provincial concern, nor is there provincial inability to  
deal with the same.  
Page: 89  
province.164 The appellate courts split on whether carbon pricing involved that degree of control.  
This Court found it did; the other two appeal courts, Ontario and Saskatchewan, found it did not.  
Although the Supreme Court held it was constitutional under the national concern doctrine for  
Parliament to establish minimum national standards for GHG pricing stringency, it did not extend  
Parliament’s power under the national concern doctrine to regulation of GHG emissions generally:  
References re Greenhouse Gas Pollution Pricing Act SCC at paras 168, 199. Therefore, while  
Parliament has the right to regulate GHG emissions for any industry or enterprise in a province  
over which it has exclusive jurisdiction, it does not have the right under the national concern  
doctrine to regulate GHG emissions generally within a province including from intra-provincial  
designated projects approved by that province, much less stop such projects from proceeding.  
[290] Lest there be any doubt about Parliament’s intentions to regulate GHG emissions from  
intra-provincial designated projects, numerous aspects of the Act are directed to exactly that: Act,  
s 22(1)(i); s 63(e). Equally patent is that Parliament has given the federal executive the authority  
to use the GHG emissions from an intra-provincial designated project to deny the project a positive  
interest determination, thereby effectively vetoing it. For example, the federal executive may make  
a negative public interest determination if it concludes that the effects of the intra-provincial  
designated project hinder Canada’s ability to meet its climate change commitments: Act, s 63(e).165  
Or if its effects involve a change to the environment that would occur in a province outside the  
one in which the project is located: Act, s 7(1)(b)(ii). That would necessarily mean all intra-  
provincial designated projects since GHG emissions, unless fully captured, escape into the  
atmosphere.  
[291] That the regulation of GHG emissions from intra-provincial designated projects falls  
squarely under specific provincial heads of power is undeniable. The very fact this legislative  
scheme exempts in situ projects from the project list where a province has a plan in place to limit  
GHG emissions within its province is proof of that. That exemption is premised on the provinces’  
jurisdiction to regulate GHG emissions in their own provinces on those subject to their  
jurisdiction.166 Nor does this legislative scheme become constitutionally permissible because it  
authorizes the federal executive to control GHG emissions project by project rather than overall in  
a province.  
[292] It is evident from the Act that if the GHG emissions from a given intra-provincial  
designated project or province in which it is located exceed whatever the federal government  
deems acceptable in the moment, the federal executive can use this as a reason for making a  
negative public interest determination. Satisfy the federal executive on these matters and the  
164  
Reference re Greenhouse Gas Pollution Pricing Act, 2019 SKCA 40 at paras 127-138; Reference re Greenhouse  
Gas Pollution Pricing Act, 2019 ONCA 544 at paras 73-74; Reference re Greenhouse Gas Pollution Pricing Act,  
2020 ABCA 74 at para 198.  
165  
This is also to be considered in the Report: Act, s 22(1)(i).  
166  
GHG emissions can be readily identified and thus regulated at source by the applicable provincial government.  
Page: 90  
proponent may succeed. But if, for example, the intra-provincial designated project exceeds the  
GHG emissions that the federal executive is prepared to accept and a negative public interest  
determination is made, the result is an effective end to the project. Could it be any clearer that  
Parliament claims the right under this legislative scheme to regulate GHG emissions both in  
individual intra-provincial designated projects and thus in individual provinces? We think not.  
[293] If Parliament had this power under the national concern doctrine, the consequences for the  
division of powers and provincial autonomy would be fatal to both. Why? That degree of federal  
power is so pervasive that it would effectively absorb the entire catalogue of provincial powers  
and unwind federalism. Virtually everything we do on this planet produces GHG emissions. If  
Parliament had regulatory control over GHG emissions generally, there would be almost no aspect  
of a province’s economy and the daily lives of the citizens of a province into which it could not  
intrude. Indeed, it is hard to imagine what aspects of the economy and daily life would be left for  
provincial Legislatures.167  
[294] To bring this down to reality, there are several ways GHG emissions could be reduced. A  
few examples, which admittedly are at one end of the extreme, for illustrative purposes only. Limit  
the number of children per family.168 Stop eating beef and become vegetarian. Stop drinking dairy  
milk. Stop living in single family homes. Limit the square footage a person, couple or family can  
occupy. Stop heating homes above a prescribed temperature and stop cooling homes below a  
prescribed temperature. Stop using gas appliances. Stop driving vehicles that cannot achieve a  
stringent mileage level per litre. Stop driving vehicles of any kind. Stop taking holidays that  
involve leaving home by plane, car or bus. Stop eating as much. Stop spending as much on  
consumer goods. Shut down all cruise vessels and all plane travel for pleasure. Shut down the dairy  
and cattle industry. Shut down all cement plants. Shut down the auto industry and aerospace  
industry. Shut down all electrical power generation plants. Shut down the production and export  
of coal. And shut down the entire Canadian oil and gas industry.  
[295] We recognize that some favour this last option and oppose any further development of oil  
and gas resources in this country. Even though Canada continues to import hundreds of millions  
of barrels of oil annually. And even though countries such as Norway, with its strong  
environmental record, rush to exploit oil and gas resources in recognition of the obvious: if this is  
not done with urgency, these resources will become stranded assets. While some may prefer not  
to hear this, the inconvenient fact is that Canada will continue to require oil and gas to meet the  
daily needs of Canadians for years, measured in double digits, if not three or possibly four decades,  
167  
As explained in W. R. Lederman, “Unity and Diversity in Canadian Federalism: Ideals and Methods of  
Moderation” (1975) 53:3 Can Bar Rev 597 at 610-611: “If ‘labour relations’ were to be enfranchised as a new subject  
of federal power by virtue of the federal general power, then provincial power and autonomy would be on the way out  
over the whole range of local business, industry and commerce as established to date under the existing heads of  
provincial power. The same point can be made about environmental pollution or economic growth ... as unitary  
legislative subjects.”  
168  
Some believe there is no greater threat to climate change than continued expansion of the world’s population.  
Page: 91  
into the future. And so too will other democratic nations. Moreover, in our fractured world today,  
energy security is vital to this country’s national security and that of other democratic nations.  
[296] Decisions as to how, where and when to reduce GHG emissions are inherently, and  
undeniably, political. This is about making political choices. While Parliament has the right to  
make those choices for matters within its exclusive jurisdiction, it does not have the right under  
the national concern doctrine to do so for matters falling within exclusive provincial jurisdiction.  
Under Canada’s Constitution, those choices are for provincial Legislatures.  
[297] Nor does Parliament possess a general treaty-making power. As noted in Attorney-General  
for Canada v Attorney-General for Ontario, [1937] AC 326 at 351 [Labour Conventions] in the  
context of the division of powers in ss 91 and 92: “there is no such thing as treaty legislation as  
such”. As explained by Hogg at §11:12: “The result of the Labour Conventions case is that the  
federal Parliament has the power to implement ‘Empire treaties’ under s. 132, but no power to  
implement Canadian treaties under s. 132”. Not only is there no freestanding treaty implementation  
power under s 91 of the Constitution Act, 1867, there is no “international accord” or “international  
undertaking” implementation power either. Accordingly, Parliament cannot impose on the  
provinces international accords or undertakings which do not even have the status of treaties  
through legislation relating to matters allocated to provincial Legislatures including the  
regulation of intra-provincial activities and emissions therefrom and the development of a  
province’s natural resources.169  
[298] Canada also relies on Interprovincial Co-operatives Ltd. et al v R, [1976] 1 SCR 477  
[Interprovincial Co-operatives] and Crown Zellerbach in support of its claim that it has the power  
under the national concern doctrine to regulate any change to the environment that occurs in one  
province from an intra-provincial designated project in another province (Act, s 7(1)(b)(ii)). It  
similarly claims authority to regulate changes to the environment that occur outside Canada from  
an activity in a province (Act, s 7(1)(b)(iii)), that is the extra-territorial effects of an intra-provincial  
designated project, in reliance on Reference re Newfoundland Continental Shelf, [1984] 1 SCR  
86 [Newfoundland Continental Shelf].  
[299] None of these cases support such a broad extension of the national concern doctrine.  
Interprovincial Co-operatives held that Manitoba legislation that purported to regulate the  
dumping of mercury in rivers in Saskatchewan and Ontario which flowed into Manitoba was  
beyond provincial jurisdiction.170 Crown Zellerbach upheld a federal law which prohibited  
dumping of toxic substances in marine waters, including provincial marine waters, under the  
169  
We recognize that the existence of international agreements can be relevant to the national concern analysis since  
they “may in some cases indicate that a matter is qualitatively different from matters of provincial concern”:  
References re Greenhouse Gas Pollution Pricing Act SCC at para 149.  
170  
One takeaway from this case was the majority’s recognition that one province could not, by its laws, require the  
shutting down of plants approved and operated in another province in compliance with the laws of that other province.  
Page: 92  
national concern doctrine. Newfoundland Continental Shelf concluded that Newfoundland did  
not have jurisdiction over the continental shelf.  
[300] Those cases are readily distinguishable from this case. When it comes to intra-provincial  
designated projects, the relevant province is regulating an intra-provincial activity located within  
its province; it is not purporting to regulate extra-provincial conduct. Further, the fact provincial  
legislation may have an incidental effect beyond its boundaries does not violate territorial  
limitations on provincial legislative competence: Global Securities Corp. v British Columbia  
(Securities Commission), 2000 SCC 21 at paras 23-24, 38, [2000] 1 SCR 494; British Columbia  
v Imperial Tobacco Canada Ltd, 2005 SCC 49 at para 28, [2005] 2 SCR 473.171  
(iii) Prohibitions on Matters Affecting Indigenous Peoples of Canada  
[301] Section 7(1)(c) prohibits the proponent of a designated project from doing any act or thing  
that may cause, with respect to the Indigenous peoples of Canada, an impact resulting from any  
change in the environment on “(i) physical and cultural heritage, (ii) the current use of lands and  
resources for traditional purposes, or (iii) any structure, site or thing that is of historical,  
archaeological, paleontological or architectural significance”. Section 7(1)(d) prohibits any act or  
thing that may cause “any change ... to the health, social or economic conditions of the Indigenous  
peoples of Canada”. When applied to intra-provincial designated projects, these provisions too  
constitute federal jurisdictional overreach.  
[302] First, there is no materiality threshold in either prohibition; both apply to any change, even  
positive change. Further, unlike ss 7(1)(a), (b) and (c), the prohibitions in s 7(1)(d) need not even  
result from a “change to the environment” but apply to “any change occurring in Canada to the  
health, social or economic conditions of the Indigenous peoples of Canada”. This expands the  
scope of this prohibition to an almost unlimited extent. Moreover, since these prohibitions apply  
to any changes, that is “any effects”, they suffer from the same overreach identified earlier vis à  
vis Parliament’s claimed jurisdiction over all effects from intra-provincial designated projects.172  
[303] Second, Canada’s claimed jurisdiction over any effects of any intra-provincial designated  
project as it relates to Indigenous peoples resulting, for example, from any change to the  
“environment” that has an impact on “the current use of lands and resources for traditional  
purposes” or any change “to the health, social or economic conditions of the Indigenous peoples  
of Canada” contradicts the fundamental principle that provincial laws of general application apply  
171  
Similarly, as explained in Reference re Upper Churchill Water Rights Reversion Act, [1984] 1 SCR 297 at 332:  
“Where the pith and substance of the provincial enactment is in relation to matters which fall within the field of  
provincial legislative competence, incidental or consequential effects on extra-provincial rights will not render the  
enactment ultra vires.”  
172  
This goes beyond what was authorized in Oldman River. “The dam on the Oldman River had an effect on navigable  
waters, fisheries and lands reserved for the Indians (there was an Indian reserve downstream from the dam site). These  
effects justified a wide-ranging environmental assessment encompassing the impact of the dam on those three subject  
matters”: Hogg §30:32.  
Page: 93  
to “Indians, and Lands reserved for the Indians”.173 The IAA improperly extends Parliament’s  
reach to “effects” of intra-provincial designated projects on Indigenous peoples from outside  
reserve lands where those effects have to do with them as people and residents of the subject  
province and are not related to their “Indianness”. Parliament does not have the power under  
s 91(24) to exempt “Indians” and the lands on which they live from provincial laws of general  
application: compare Siksika Health Services v Health Sciences Association of Alberta, 2019  
ABCA 494 at para 39, 99 Alta LR (6th) 73.  
[304] If Canada were correct that Parliament’s jurisdiction over “Indians, and Lands reserved for  
the Indians” extended to any “effects” (as Parliament has self-defined them) from any intra-  
provincial designated project on “the health, social or economic conditions” of the Indigenous  
peoples of Canada or on any change to the “environment” that has an impact on “the current use  
of lands and resources for traditional purposes” by the Indigenous peoples of Canada, there would  
be virtually no intra-provincial activity in this country that would be free of federal oversight,  
regulation and veto since the Indigenous peoples of Canada populate the landscape across this  
country and are involved in all dimensions of Canadian society. Under this theory, provincial  
jurisdiction over intra-provincial activities would be rendered meaningless.  
[305] Third, through this legislative scheme, Parliament has done something else it has no  
jurisdiction to do under the division of powers. That is to convert Aboriginal and treaty rights  
under s 35 into a veto by the federal executive. Parliament has done so by giving the federal  
executive the right to effectively veto an intra-provincial designated project. But where Aboriginal  
and treaty rights are engaged with respect to an intra-provincial designated project, Parliament  
does not have the constitutional right to second guess a provincial government’s compliance with  
its duty under s 35.  
[306] Assume that a province, in compliance with the province’s constitutional obligations,  
enters into an agreement either directly with an Indigenous entity respecting an intra-provincial  
designated project that the Indigenous group regards as beneficial and in its interests or with the  
Indigenous entity and the proponent of the project. Under the IAA, that project can be sidelined  
indefinitely and ultimately terminated through a negative public interest determination by the  
federal executive. For those detailed provincial obligations, Canada would substitute its assurance  
to the Indigenous entity that what Parliament is doing under the IAA is in its interests in light of  
their legislative power relating to “Indians, and Lands reserved for the Indians”. In such  
circumstances, the rug would have been pulled out from under the exercise of provincial legislative  
and constitutional authority to (a) authorize the intra-provincial designated project and (b) enter  
into an agreement with the Indigenous entity and, if applicable, proponent in question. The  
provincial Crown would have honoured its relationship with the Indigenous entity, but it would be  
worth nothing to them.  
173  
See Act, s 7(1)(c)(ii) and s 7(1)(d).  
Page: 94  
[307] Parliament’s jurisdiction under s 91(24) does not include subjecting any agreement  
involving the provincial government and an Indigenous entity with respect to an intra-provincial  
designated project to federal government oversight and approval. The province’s duty to consult  
and accommodate to the extent necessary and appropriate is with the Indigenous entity involved,  
not with the federal government. And it is the courts, not the federal government, that determine  
whether a provincial government has met its constitutional duty under s 35 to Indigenous peoples.  
[308] Fourth, regardless of whether Aboriginal or treaty rights are involved, Parliament’s  
jurisdiction under s 91(24) does not include substituting federal authority for the rights of  
Indigenous peoples to make their own agreements with provincial governments or with proponents  
of intra-provincial designated projects. And yet, through the IAA, Parliament invokes its own  
obligations towards Indigenous people under s 91(24) of the Constitution Act, 1867 to override not  
only provincial legislative powers and duties but also an agreement entered into by an Indigenous  
entity with the proponent and province or with the proponent and approved by the province or  
provincial authority.  
[309] Since there are hundreds of First Nations, it is likely that some intra-provincial designated  
projects will be viewed as positive by some Indigenous peoples, and negative by others. This was  
the case with the Indigenous intervenors on this Reference, some of whom supported Alberta’s  
position and others, Canada’s.  
[310] This legislative scheme allows a proponent of an intra-provincial designed project to cause  
a change that “is not adverse” to the health, social or economic conditions of an “Indigenous group,  
community or people” with the agreement of the council, government or other entity authorized to  
act on their behalf: Act, s 7(4). In other words, the proponent and affected Indigenous entity are  
precluded from entering into an agreement that would authorize any “adverse” change to the  
matters identified in s 7(1)(d) even if insignificant and even if offset by some other consideration.  
The result the proponent of an intra-provincial designated project supported by an Indigenous  
entity, which may even have an ownership interest in the project, cannot cause any “adverse”  
change to matters in s 7(1)(d) even where the project would provide overall benefits to the affected  
Indigenous entity, and with their agreement.  
[311] Further, with respect to s 7(1)(c), there is no provision to allow for a proponent to cause a  
change thereunder even with the agreement of the affected Indigenous entity. The result the  
proponent of an intra-provincial designated project cannot cause any change whatever to matters  
in s 7(1)(c) even if the changes are positive and agreed to by the affected Indigenous entity.  
[312] Moreover, the IAA gives the final say to the federal executive, not the Indigenous entity. In  
particular, the federal executive is authorized to stop any intra-provincial designated project based  
on its view of the effects of that project on the interests of an Indigenous group or on its view of  
the public interest generally notwithstanding the view of that group. That is so whether Aboriginal  
or treaty rights are, or are not, directly involved.  
Page: 95  
[313] A number of First Nations oppose the prohibitions in ss 7(1)(c) and (d) and raise arguments  
related to the legal effects of those provisions. The intervenor Woodland Cree noted that the Truth  
and Reconciliation Commission found that reconciliation includes the economic development of  
Indigenous peoples. This Court has previously stressed that economic development on reserve  
lands is in the public interest: AltaLink Management Ltd v Alberta (Utilities Commission), 2021  
ABCA 342 at para 59. The Woodland Cree contend the IAA reduces their voice in decisions  
regarding their own natural resources, provides excessively broad public participation rights on  
their projects and potentially negates their ability to develop their natural resources.  
[314] The intervenor Indian Resource Council, which represents oil and gas producing First  
Nations, submits that the right to produce minerals, including hydrocarbons, on their lands, is as  
much an Aboriginal right as hunting, fishing and gathering rights and is protected by s 35 of the  
Constitution Act, 1982. In its view, the production of hydrocarbons is not inherently an adverse  
change to the health, social and economic conditions of Indigenous peoples and can provide  
positive changes to their lives. The Indian Resource Council also asserts that Indigenous peoples  
have an Aboriginal right “to improve their economic and social conditions through the creation of  
economic activity and the realization of economic rents from the production of hydrocarbons”:  
Factum at para 17. In its view, the IAA “grants both de jure and de facto veto power over any  
particular project to the Governor in Council”: Factum at para 13. We agree. It does.  
[315] That this legislative scheme permits the federal executive to stop intra-provincial  
designated projects authorized by a province or provincial authority even where agreements have  
been made by an Indigenous entity with either or both the provincial government and project  
proponent and with provincial approval again constitutes federal overreach. It also underscores  
that the true purpose of this legislative scheme is to empower the federal executive to veto intra-  
provincial designated projects based on its view of the public interest, not what is in the interests  
of the Indigenous entity involved, never mind the interests of the province in question and its  
citizens.  
[316] The preamble in the Act states that Canada is committed to “ensuring respect for the rights  
of the Indigenous peoples of Canada and to fostering reconciliation and working in partnership  
with them”. Restricting what Indigenous peoples are permitted – and not permitted to do of their  
own accord through the prohibitions in ss 7(1)(c) and (d) smacks of paternalism. Indigenous  
peoples have suffered the sting of paternalism since the 19th Century: see for example the history  
set out in McDiarmid Lumber Ltd. v God’s Lake First Nation, 2006 SCC 58 at paras 46-68,  
[2006] 2 SCR 846. The autonomy of Indigenous peoples includes their ability, via their leadership,  
to make lawful arrangements with provincial authorities and proponents of intra-provincial  
designated projects for what they consider to be in their best interests. Section 91(24) provides no  
constitutional basis for Parliament’s imprisoning Indigenous peoples in their own Aboriginal and  
treaty rights.  
(iv)  
Additional Prohibitions  
Page: 96  
[317] Finally, the proponent of a designated project is prohibited from causing “any change to a  
health, social or economic matter within the legislative authority of Parliament that is set out in  
Schedule 3”: Act, s 7(1)(e). While nothing has yet been specified in Schedule 3, the Act authorizes  
the addition of any health, social or economic matter without limitation by order of the Governor  
in Council: Act, s 7(2). The potential scope of this legislative delegation is immense and no link to  
an adverse effect on the environment is required.  
(v)  
Term and Effect of the Prohibitions  
[318] The prohibitions imposed by s 7 continue to apply: (1) throughout the review process,  
except where the Agency decides no impact assessment is required or permits certain acts to be  
done for information gathering purposes: Act, s 7(3)(a), s 7(3)(c); and (2) indefinitely, unless the  
proponent complies with any conditions imposed in a decision statement issued under s 65: Act,  
s 7(3)(b).174  
[319] Canada argues that the s 7 prohibition is merely a “temporary hold”. That argument is  
without merit. The net effect of these provisions is that a proponent of an intra-provincial  
designated project cannot ever realistically proceed with that project, conditionally or otherwise,  
without a positive public interest determination. In the absence of that positive determination, the  
federal executive has no obligation to set out any conditions that the proponent would need to meet  
to proceed with the intra-provincial designated project. That is so whether the project requires a  
federal permit or not. The result is that without a positive public interest determination, the  
prohibitions remain in effect and the “temporary hold” becomes a “permanent hold”.  
d.  
Exercise of Federal Regulatory Power  
[320] As noted, s 8(b) of the Act prohibits a federal authority from exercising any power or  
performing any duty that could permit a designated project to be carried out in whole or in part  
until the IAA review has been completed and until a positive public interest determination has been  
made. The legal effect of this provision is that, where an intra-provincial designated project  
requires a federal permit, a federal authority is forbidden from setting conditions under which that  
permit will be issued unless and until the federal executive makes a positive public interest  
determination: ss 8(b), 60(1), 62. Then, and only then, is the federal executive under any obligation  
to identify the conditions that a proponent must meet: s 64(2). And then, and only then, is the  
proponent of the intra-provincial designated project able to seek and secure any required federal  
permit under other federal legislation.  
e.  
Requirement for Public Interest Determination by the Federal Executive and  
Consequences if Determination Is Not Positive  
(i)  
Key Decision Under the IAA  
174  
This presupposes that a decision has not been made at the outset that no review process is required.  
Page: 97  
[321] At the heart of the regulatory process under the IAA lies the public interest determination.175  
(ii)  
Public Interest Determination by the Federal Executive  
Public Interest Determination Is Based on the Intra-Provincial Designated Project as a Whole  
[322] Alberta, Saskatchewan and Ontario contend that the federal executive’s public interest  
determination when applied to intra-provincial designated projects and therefore whether an  
intra-provincial designated project is able to proceed is based on its assessment of the designated  
project as a whole having regard to federal priorities and policies. Canada disagrees. It argues that  
the Minister and Governor in Council do not consider whether the designated project as a whole  
is in the public interest but rather whether the adverse federal effects are in the public interest.  
According to Canada, this is done by considering all the positive and negative effects arising out  
of a proposed project and comparing them to the adverse federal effects to determine if the adverse  
federal effects are in the public interest.  
[323] The Minister is required to consider a Report prepared by the Agency and make the public  
interest determination set out in s 60(1) or refer that determination to the Governor in Council for  
its consideration under s 62. Section 60(1) provides:  
After taking into account the report with respect to the impact  
assessment of a designated project ..., the Minister must  
(a) determine whether the adverse effects within  
federal jurisdiction and the adverse direct or  
incidental effects that are indicated in the report  
are, in light of the factors referred to in section 63  
and the extent to which those effects are significant,  
in the public interest; or  
(b) refer to the Governor in Council the matter of  
whether the effects referred to in paragraph (a) are,  
in light of the factors referred to in section 63 and  
the extent to which those effects are significant, in the  
public interest. [Emphasis added]  
175  
Other decision-making points from which legal effects flow include (a) the Minister’s notice prior to  
commencement of the assessment process advising either that the federal authority will not be exercising a power  
required for that designated project to be carried out or that the Minister is of the opinion that the designated project  
would cause unacceptable environmental effects within federal jurisdiction and the basis for this opinion (Act, s 17(1));  
(b) a determination by the Agency whether an impact assessment is required (Act, s 16); and (c) conduct of the impact  
assessment by the Agency or review panel and preparation of the Report (Act, ss 18-57).  
Page: 98  
[324] Where a Report is prepared by a review panel, the Minister is required to refer that  
determination to the Governor in Council: Act, s 61(1). Section 62 sets out terms for the public  
interest determination by the Governor in Council that are identical to those prescribed for the  
Minister under s 60(1)(a):  
If the matter is referred to the Governor in Council under paragraph  
60(1)(b) or section 61, the Governor in Council must, after taking  
into account the report with respect to the impact assessment of the  
designated project that is the subject of the referral, determine  
whether the adverse effects within federal jurisdiction and the  
adverse direct or incidental effects that are indicated in the report  
are, in light of the factors referred to in section 63 and the extent to  
which those effects are significant, in the public interest. [Emphasis  
added]  
[325] The legal effect of all relevant provisions is that, in making a public interest determination  
with respect to an intra-provincial designated project, both the Minister and Governor in Council  
will necessarily determine whether the project overall is in the public interest having regard to  
federal priorities and policies.  
[326] First, the definitions of “effects” and “environment” are so broad and all encompassing that  
the public interest determination must, of necessity, include a consideration of the effects of the  
intra-provincial designated project as a whole. Indeed, one of the rationales for this legislative  
scheme is to assess the designated project as a whole. A determination whether the adverse federal  
effects are in the public interest cannot be made without considering whether the intra-provincial  
designated project itself is in the public interest. The two are inextricably linked. It is only if the  
public interest determination, taking into account all of the effects of the project, is positive that it  
would be possible to conclude that “adverse effects within federal jurisdiction” could be in the  
public interest. After all, how could adverse federal effects ever be in the public interest unless the  
public interest in the project overall outweighed those adverse federal effects?176 To put it another  
way, in assessing whether “adverse effects” are in the public interest, the obvious question is  
“compared to what”? The comparison here, even under Canada’s own formulation, is to the  
designated project overall, that is all its positive and negative effects.  
[327] Second, what is implicit in ss 60 and 62 namely that the federal executive has the right  
in making its public interest determination to do so based on whether the effects of the designated  
project overall are in the public interest is made explicit in s 64. Section 64(1), which is linked  
back to the determinations made by the Minister or Governor in Council under ss 60(1)(a) or 62,  
provides as follows:  
If the Minister determines under paragraph 60(1)(a), or the  
176  
La Forest J made essentially the same point in Oldman River.  
Page: 99  
Governor in Council determines under section 62, that the effects  
that are indicated in the report that the Minister or the Governor in  
Council, as the case may be, takes into account are in the public  
interest, the Minister must establish any condition that he or she  
considers appropriate in relation to the adverse effects within federal  
jurisdiction with which the proponent of the designated project must  
comply. [Emphasis added]  
[328] This section distinguishes between the “effects” in the Report which relate to the whole  
project, both positive and negative, since that is what must be included in the Report and the  
“adverse effects within federal jurisdiction”. In doing so, it makes it clear that it is only if the  
Minister or Governor in Council have determined that the “effects” are in the public interest that  
the Minister must then establish any condition in relation to the “adverse effects within federal  
jurisdiction”. In other words, s 64 explicitly contemplates that the Minister’s and Governor in  
Council’s determination under s 60 and s 62 respectively regarding the public interest will be based  
on the “effects” of the designated project as a whole: see s 64(1).177  
[329] Third, s 8 makes it clear that the public interest determination is based on the effects of the  
whole project, and not merely adverse federal effects. Section 8 precludes a federal authority from  
issuing a permit or authorization that could permit a project to be carried out unless the decision  
statement issued by the Minister sets out that “the effects that are indicated in the report with  
respect to the impact assessment of that project are in the public interest”. As noted, the Report  
must include all the effects of the designated project, not merely the adverse federal effects.  
Public Interest Determination Must Include Mandatory Factors  
[330] In any event, the public interest determination extends beyond the adverse federal effects  
of an intra-provincial designated project regardless. The reason the Act explicitly requires that  
the public interest determination by the Minister and Governor in Council must be based not only  
on the Report but also the s 63 mandatory factors. The breadth of these mandatory factors too  
belies Canada’s narrow characterization of what the federal executive’s public interest  
determination involves. Section 63 provides:  
The Minister’s determination under paragraph 60(1)(a) in respect of  
a designated project referred to in that subsection, and the Governor  
in Council’s determination under section 62 in respect of a  
designated project referred to in that subsection, must be based on  
the report with respect to the impact assessment and a consideration  
of the following factors:  
177  
Similarly, s 64(2) distinguishes between the effects indicated in the Report and the direct or incidental effects and  
it is only if the effects are found to be in the public interest, which here too must necessarily mean the effects of the  
project overall, that the Minister is then obligated to establish the conditions directly linked or necessarily incidental  
to the issuance of a federal permit by a federal authority.  
Page: 100  
(a) the extent to which the designated project contributes to  
sustainability;  
(b) the extent to which the adverse effects within federal jurisdiction  
and the adverse direct or incidental effects that are indicated in the  
impact assessment report in respect of the designated project are  
significant;  
(c) the implementation of the mitigation measures that the Minister  
or the Governor in Council, as the case may be, considers  
appropriate;  
(d) the impact that the designated project may have on any  
Indigenous group and any adverse impact that the designated  
project may have on the rights of the Indigenous peoples of Canada  
recognized and affirmed by section 35 of the Constitution Act, 1982;  
and  
(e) the extent to which the effects of the designated project hinder or  
contribute to the Government of Canada’s ability to meet its  
environmental obligations and its commitments in respect of climate  
change. [Emphasis added]  
[331] When applied to intra-provincial designated projects, these s 63 mandatory factors  
demonstrably go beyond matters actually within federal jurisdiction under the division of  
powers.178  
Conclusions Regarding Scope and Content of Public Interest Determination  
[332] For these reasons, however one expresses the process leading to the federal executive’s  
public interest determination whether the public interest in proceeding with the intra-provincial  
designated project overall is sufficient to overcome the adverse federal effects, or whether it is in  
the public interest to proceed with the project despite the adverse federal effects, or whether the  
adverse federal effects are in the public interest the end result is the same. The federal executive  
is empowered to determine, in the exercise of its unilateral discretion, whether the project overall  
is in the public interest.  
178  
Three of the s 22 mandatory factors are identical to the s 63 mandatory factors: ss 22(1)(c), (h) and (i). Both the s  
22 and s 63 mandatory factors include ones that go directly to the project overall: the extent to which the designated  
project contributes to sustainability (s 22(1)(h), s 63(a)); and the extent to which the effects of the designated project  
hinder or contribute to the Government of Canada’s ability to meet its environmental obligations and its commitments  
in respect of climate change (s 22(1)(i), s 63(e)).  
Page: 101  
[333] In doing so, it assesses the intra-provincial designated project overall and determines  
whether its effects (which will of necessity include all its positive and negative effects) outweigh  
the adverse effects claimed to be within federal jurisdiction sufficiently to warrant a favourable  
public interest determination having regard as well to the mandatory factors. The fact the public  
interest determination includes a consideration of adverse federal effects does not change this  
fundamental aspect of this legislative scheme. In other words, the effects of the intra-provincial  
designated project overall are an inescapable part of the federal executive’s public interest  
determination. What is equally inescapable is that the federal executive’s determination of whether  
the project is in the public interest will be made having regard to federal priorities and policies.  
That is evident from both the mandatory factors to be considered and the scope of the adverse  
federal effects.  
[334] However, Parliament has no constitutional right to empower the federal executive to use a  
negative public interest determination, based on mandatory factors and effects, a number of which  
are not linked, or not sufficiently linked, to federal heads of power, to prohibit an intra-provincial  
designated project from proceeding. And yet, that is exactly the effect of this legislative scheme.  
This constitutes fatal federal jurisdictional overreach.  
[335] For example, an intra-provincial designated project aimed at developing Saskatchewan’s  
natural resources might cause a minor adverse impact on fish or fish habitat to a degree otherwise  
permissible under federal law such that no federal permit was required.179 If that minor adverse  
federal effect were the only consideration, one would expect there would be no basis to make a  
negative public interest determination. Under the Act, however, if the Minister were of the view  
that the intra-provincial designated project would hinder Canada’s ability to meet its climate  
change commitments, the Minister could conclude that the adverse federal effects on fish or fish  
habitat were not offset by any net benefit of the project as a whole when viewed from the  
perspective of Canada’s treaty obligations and therefore, such effects were not in the public  
interest. The end result would be that the intra-provincial designated project that did not even  
require a federal permit would be prevented from proceeding with the minor effect on fish or fish  
habitat otherwise permissible under federal law essentially acting as a “hook” to anchor the  
negative public interest determination and stop the project.  
[336] Further, unlike the Guidelines Order under which any conditions that could have been  
imposed were contained in valid federal legislation relating to permits or authorizations, the IAA  
permits the imposition of any conditions the Minister “considers appropriate in relation to the  
adverse effects within federal jurisdiction”: Act, s 64(1). Since adverse federal effects are not all  
within Parliament’s jurisdiction, this too constitutes impermissible federal overreach when applied  
to intra-provincial designated projects.  
179  
A permit is required under the Fisheries Act for any work, undertaking or activity, other than fishing, that “results  
in the death of fish” or the “harmful alteration, disruption or destruction of fish habitat”. This Act prohibits an effect  
on fish habitat by an intra-provincial designated project even where the effects are so minor that they do not even  
result in the death of fish or the harmful alteration, disruption or destruction of fish habitat. Otherwise, the project  
would require a federal permit under the Fisheries Act.  
Page: 102  
Public Interest Determination and Oldman River  
[337] Canada argues that Oldman River is authority for the validity, and use, of the public interest  
determination under this legislative scheme vis à vis intra-provincial designated projects. This  
argument cannot withstand scrutiny.  
[338] To unpack why, we start with this. In deciding whether to grant a proponent of an intra-  
provincial designated project a federal permit, the federal government is entitled to consider the  
public interest in the project overall. As La Forest J pointed out in Oldman River at 39, it would  
be difficult to understand how the federal government could decide that a federal permit under the  
Navigable Waters Protection Act could be issued notwithstanding “harm” to navigable waterways  
unless the public interest in proceeding with the project warranted issuance of a federal permit.180  
Thus, he made it clear that whether the project overall was in the public interest could be used to  
grant a federal permit.  
[339] But notably, La Forest J did not state that if the federal government decided that a project  
was not in the public interest, that could be used to deny a federal permit. The theory that the  
results of a public interest assessment should work both ways holds to the view that if the federal  
government can use a positive public interest determination to grant or relax a federal permit, it  
should be able to use a negative public interest determination to deny the federal permit.  
[340] However, this presupposes an equivalency between the two positions. Arguably, there is  
not. In the first case, the federal government is using a positive public interest determination as a  
reason to “stand down” from a veto it could otherwise use under one of its heads of power and  
instead support an intra-provincial designated project approved by the province. In doing so, the  
federal government remains within its constitutional lane. Nor is it harming any core competence  
of the provincial government. But the reverse is not necessarily so on either count.  
[341] The federal government’s power to deny a federal permit must be exercised for the right  
reasons. A denial must be based on the effects of the intra-provincial designated project on the  
federal head of power engaged, not on a negative public interest determination grounded in factors  
and considerations untethered to the head of power. Were the denial based on factors and  
considerations other than the actual effects of the project alone on, for example, the fisheries, the  
federal government would be operating outside its constitutional lane.181 In such circumstances, it  
180  
“If the significance of the impact on marine navigation were the sole criterion, it is difficult to conceive of a dam  
of this sort ever being approved. It is clear, then, that the Minister must factor several elements into any cost-benefit  
analysis to determine if a substantial interference with navigation is warranted in the circumstances”: Oldman River  
at 39.  
181  
As explained in Kennett at 200-201 with respect to an intra-provincial dam and Parliament’s limited jurisdiction  
to address the consequences of the dam for areas of federal responsibility: “While Parliament can, of course, veto the  
dam, respect for the limits of restricted jurisdiction requires that it only do so for reasons related to its areas of  
Page: 103  
would be using the federal executive’s assessment of the public interest overall to deny the federal  
permit even if the actual effects of the project on a federal head of power did not warrant the denial.  
After all, if the effects on the fisheries themselves were sufficient to justify the denial, the federal  
government would have no reason to rely on a public interest assessment rooted in policies and  
priorities extraneous to the effects on the fisheries.  
[342] Take for example “the extent to which the designated project contributes to sustainability”,  
one of the s 63 mandatory factors. Or the “need for the designated project”, one of the s 22  
mandatory factors that must be considered in the Report. Both go into the federal executive’s  
public interest determination. There is an issue whether these mandatory factors would be relevant  
to the valid exercise of the federal government’s discretion vis à vis a permit under the Fisheries  
Act. And a related issue is whether the federal government would be doing indirectly what it could  
not do directly, that is veto an intra-provincial designated project based not on the effects of the  
project on the fisheries but on federal priorities and policies unrelated to the valid exercise of  
discretion.  
[343] Whatever the answer to whether the federal executive’s public interest determination can  
be validly used to deny a federal permit for an intra-provincial designated project, this legislative  
scheme runs afoul of the division of powers regardless. The IAA catapults well past intra-provincial  
designated projects that require a federal permit. Parliament could easily have restricted the IAA  
to intra-provincial designated projects in respect of which it actually has some decision-making  
authority. It did not. And deliberately so. It has expressly included in the project list intra-  
provincial designated projects that do not require a federal permit, that is those in respect of which  
it has no decision-making authority.  
[344] More important, the public interest determination under the IAA is far removed from what  
was approved in Oldman River. Under this legislative scheme, there is no required link between  
the public interest determination by the federal executive and a federal permit. Nor is there even  
any required link between the public interest determination and the exercise of a federal head of  
power. In all instances, the public interest determination by the federal executive is not being made  
as part of deciding whether a federal permit should be granted or denied. It stands separate and  
apart from that entirely. It is being made by the federal executive in deciding whether to permit  
the intra-provincial designated project to proceed or to stop it. Simply, Parliament has authorized  
the federal executive to make its public interest determination based on certain mandatory factors  
and effects that are not all linked to a federal head of power, or even if linked, not sufficiently  
linked, to a federal head of power.  
[345] Oldman River was not an invitation to Parliament to do indirectly through a public interest  
assessment by the federal executive what it cannot do directly under the division of powers, namely  
authority.... [O]nce the [environmental assessment] considers the full range of environmental effects, it risks  
transforming restricted jurisdiction (based on the dam’s consequences for fisheries) into de facto comprehensive  
jurisdiction, enabling the federal government to base its refusal to issue a Fisheries Act licence on its view of the  
dam’s costs in areas of provincial jurisdiction.”  
Page: 104  
veto an intra-provincial designated project where the veto is not linked to the proper exercise of  
federal decision-making authority with respect to that project. That decision-making authority  
under valid and applicable federal legislation establishes that an aspect of the intra-provincial  
designated project actually falls within a federal head of power under the Constitution.  
The Federal Executive Effective Veto Over Intra-Provincial Designated Projects  
[346] What then does all this mean? Just this. Through this legislative scheme, Parliament has  
granted the federal executive what amounts to an effective veto over all intra-provincial designated  
projects in this country. While the IAA does not use the word “veto”, the combination of the  
requirement for a positive public interest determination and the continued prohibitions, fines and  
injunctions speak for themselves. No intra-provincial designated project can proceed without the  
express approval of the federal executive. That the federal executive never utters the word “veto”  
is irrelevant. Because by not making a positive public interest determination, it is effectively  
vetoing the intra-provincial designated project. Thus, the theory that the federal executive is not  
vetoing an intra-provincial designated project when it makes a negative public interest  
determination cannot be sustained.  
[347] Put succinctly, even where the federal government has no decision-making authority with  
respect to an intra-provincial designated project, the federal executive can stop that is veto that  
project unless it decides that the intra-provincial designated project is in the public interest based  
on federal priorities and policies. That is beyond Parliament’s jurisdiction under Canada’s  
Constitution.  
f.  
Time Limits for Assessments and Decision Statements  
[348] CEAA 2012 first introduced legislated time limits for environmental assessments. Neither  
the Guidelines Order nor CEAA 1992 had prescribed time limits.182 CEAA 2012 specified that  
certain stages of an environmental assessment were to be completed within a certain number of  
days, subject to extension: CEAA 2012, ss 10, 27(2), 54(2).  
[349] The Act also provides for legislated time limits. But two critical points should be noted.  
First, the length of the review process has been extended considerably.183 Under CEAA 2012, if a  
federal impact assessment proceeded without any extensions of time, the maximum length of time  
it could take for the assessment to be completed was 13.5 months by the Agency and 2 years and  
4 months by a review panel. By contrast, the corresponding times under the Act for an assessment  
by the Agency is now 4 years and 5 months (where the decision is by the Minister) and 4 years  
and 7 months (where the decision is by the Governor in Council). And where the assessment is by  
182  
Generally, under both, an environmental assessment was to start as early as possible and conclude before any  
regulatory decision-making: see Guidelines Order, s 3; CEAA 1992, s 11.  
183  
The proponent now has three years to provide the information the Agency sets out in its notice of commencement  
of the impact assessment: Act, s 19(1). That is necessarily linked to the extent of the information demanded.  
Page: 105  
a review panel, the time is 4 years and 7 months (where the decision is by the Minister) and 5  
years and 5 months (where the decision is by the Governor in Council).  
[350] Second, under the Act, the Governor in Council may extend a number of key time limits  
repeatedly and indefinitely.184 The Agency is given almost a year after it receives all required  
information to submit its Report to the Minister.185 But the Act gives the Minister and then the  
Governor in Council the authority to extend the prescribed time limit by which the Agency must  
do so, and in the case of the Governor in Council, that extension may be “any numbers of times”.186  
The result: there is no effective deadline by which the Agency must provide its Report to the  
Minister. That is also so if a review panel conducts the impact assessment. Here too, there is no  
effective deadline by which the review panel must provide its Report.187  
[351] On receipt of a Report, the Minister must (a) make a determination with respect to the  
public interest; or (b) refer this determination to the Governor in Council.188 That leads in turn to  
a “decision statement” which must be issued by the Minister within a certain number of days after  
the Report, or summary of it, is posted on the Internet site informing the proponent of the public  
interest determination. The time limit is no later than 30 days for the Minister’s decision and 90  
days for the Governor in Council decision. But again, these time limits too may be extended  
initially up to a maximum of 90 days for any reason the Minister considers necessary: Act, s 65(5).  
And again, under s 65(6), the concept of a definitive time limit is erased since it provides that the  
Governor in Council may, on the recommendation of the Minister, “extend the time limit extended  
under subsection (5) any number of times”.  
[352] All this being so, there are no finite time limits within which the Minister and Governor in  
Council must make a public interest determination with respect to an intra-provincial designated  
project and the Minister issue a decision statement relating thereto.  
184  
See the Act, ss 28(5)-(7), 37(2)-(4), 65(6).  
185  
The Agency must provide the Report no later than 300 days after the day on which it posts the notice under s 19(4)  
on the Internet site: s 28(2).  
186  
Under s 28(6) of the Act, the Minister may extend the time for provision of this Report by any period up to a  
maximum of 90 days for certain purposes. But under s 28(7) of the Act, if the Minister so recommends, the Governor  
in Council may extend the extended 90 day time limit under s 28(6), “any number of times”.  
187  
A review panel must submit its Report to the Minister within 600 days unless the Agency is of the opinion that  
more time is required for certain purposes: s 37(2). The Minister may extend this time limit up to a maximum of 90  
days: s 37(3). This extended time limit may, if the Minister recommends, be extended by the Governor in Council  
“any number of times”: s 37(4). That is also so where the Minister refers a designated project to a review panel under  
s 43: Act, s 37.1.  
188  
Under s 61(1), where the Minister receives a Report from a review panel (under s 55) or from the Agency (under  
s 59, where the review panel has been terminated), the Minister, in consultation with the responsible Minister, must  
refer the determination of the “public interest” directly to the Governor in Council.  
Page: 106  
g.  
Consultation with Other Jurisdictions  
[353] The Act contemplates the possibility of consulting with other jurisdictions at various stages  
of review of a designated project.189 The Minister can also approve the substitution of another  
jurisdiction’s review process provided certain conditions are met: Act, s 31. And the Minister can  
enter into an agreement with another jurisdiction (including a province) for the establishment of a  
joint review panel: Act, s 39.  
[354] However, many of these provisions are subject to a number of constraints. For example,  
under s 31, the Minister may approve the substitution of another jurisdiction’s assessment process  
for the federal process, but only if the Minister is satisfied, amongst other things, that the  
substituted process will consider the s 22 mandatory factors. Of course, that compels the provinces  
themselves to place on the scale factors which lie at the root of the constitutional challenge to the  
IAA. In other words, unless the province is prepared to consider all the mandatory factors the  
federal government demands, there can be no substituted process. Further, the Minister cannot  
even approve a substitution if the impact assessment has been referred to a review panel.190  
[355] In any event, the potential for consultation and substitution does not affect the validity of  
the challenged legislative scheme under the division of powers. Cooperative federalism does not  
override or modify the division of powers: Rogers Communications at para 39.  
3.  
Practical Effects of the IAA  
[356] Efficacy of legislation is not relevant to a division of powers analysis; it does not advance  
the pith and substance inquiry: Ward v Canada (Attorney General), 2002 SCC 17 at para 26,  
[2002] 1 SCR 569. That said, there is a difference between efficacy of a statute and its practical  
effects. Efficacy goes to the effectiveness of the means chosen to achieve the identified legislative  
purpose; practical effects to the actual impact of the legislation on those subject to it. Therefore,  
while courts do not have either the institutional capacity or legitimacy to decide whether a statute  
is a “good idea”, the practical effects of the legislation remain relevant in a division of powers  
analysis.  
[357] The practical effects of this legislative scheme are also fatal to the putative federal  
jurisdiction vis à vis intra-provincial designated projects.  
a.  
Delay  
189  
The Agency is required, when preparing for a possible impact assessment of a designated project, to offer to consult  
with any jurisdiction that has powers in relation to an environmental assessment of the project and with any Indigenous  
group that may be affected by the project: Act, s 12. The Agency, or the Minister if the impact assessment of a  
designated project has been referred to a review panel, is required to offer to consult with any jurisdiction that has  
powers in relation to an environmental assessment of the project: Act, s 21.  
190  
Or if the project includes activities regulated under certain other federal legislation.  
Page: 107  
[358] It is indisputable that one of the practical effects of the Act is delay. Given the structure of  
this legislative scheme, this is not surprising.  
[359] At every point that counts, when a step is to be taken or a decision is to be made by the  
Minister or Governor in Council, there is no enforceable deadline by which that step or decision  
must be made.191 In particular, there is no requirement that the decisive decision-making step, the  
issuance of a “decision statement”, which includes the public interest determination, will be made  
by the Minister or Governor in Council within any finite time frame, reasonable or not. Instead,  
the Act permits an endless loop of delay.  
[360] Intra-provincial designated projects can be killed under this Act in different ways. A  
negative public interest determination by the federal executive is one way. But it is not the only  
one. Death by delay will do so as well.  
[361] In the commercial world, no responsible investor is willing to wait for years, much less  
indefinitely, for an answer on whether required approvals are forthcoming. Why would they? By  
that point, they will have invested substantial funds, likely measured in the millions, along with  
the attendant manpower, complying with prescribed environmental impact assessments, whether  
by one or both levels of government. And where natural resources are concerned, they will also  
likely have spent substantial funds acquiring leasehold interests in those resources.  
Understandably, they would anticipate an answer, and within a reasonable time. And while they  
have no legal entitlement to demand either, one would expect the federal government would be  
interested in providing one.  
b.  
Uncertainty  
[362] Another practical effect of this statutory regime is uncertainty. If there were one  
consideration above all that militates strongly against investment in any country, it is uncertainty.  
Investors crave certainty. Those investing in intra-provincial designated projects need to know,  
and be able to rely on, the ground rules that apply to a proposed project. This is especially so where  
those investments would potentially be measured in billions of dollars. Further, while Canada  
remains an importer of foreign capital, capital flow works both ways. Investors, both foreign and  
domestic, can vote with their feet if a country is not competitive on the investment front.  
Predictability and reliability of investing rules are essential to Canada’s economic success in an  
integrated world.  
[363] Of course, it is a given that all regulatory processes will involve some elements of  
uncertainty about the outcome. But under this legislative scheme, the problem is the process itself.  
Uncertainty infects every step of the process. Moreover, the proponent may find itself locked  
191  
As noted, that is so for the Agency and review panel as well.  
Page: 108  
inside disputes between the federal and provincial governments. Investors understandably have no  
interest in being involved in inter-jurisdictional disputes.  
[364] Add to this that the proponent has no idea what conditions may be imposed under what  
claimed federal heads of power for the intra-provincial designated project to proceed. Typically,  
when a proponent intends to proceed with a project, that involves identifying what must be done  
to comply with conditions likely to be imposed to proceed with the project and obtain any required  
federal permits. But under this legislative scheme, the federal executive has no obligation to  
identify any potential conditions unless it makes a positive public interest determination even  
where the intra-provincial designated project has already been approved, and permits issued, by  
the provincial government.  
[365] All of this substantially increases regulatory risk and cannot help but negatively impact  
investor confidence and capital investment in Canada. Potential investors might well view the IAA  
as the poster child for “invest in this country at your peril”.  
c.  
No Practical Remedy to Review Federal Action/Inaction  
[366] A third practical effect of this statutory scheme relates to judicial review. Canada and its  
supporters submit that should the federal government overshoot the proper boundaries of its  
powers under the IAA, there would be a remedy available in judicial review. But constitutionality  
does not turn on the availability or efficacy of judicial review. An unconstitutional law is not made  
constitutional because the exercises of discretion thereunder are subject to judicial review.  
[367] In any event, there is no air of reality to the suggestion that the decision by the Governor  
in Council or Minister to designate certain kinds of intra-provincial activities as designated projects  
would be subject to a successful judicial review.192 Parliament’s grant of such a generalized  
exercise of discretion in favour of the federal executive means there is no “line” delimiting what  
falls on the unreasonableness side. The IAA specifies no facts and law that substantively constrain  
the federal executive: Canada (Minister of Citizenship and Immigration) v Vavilov, 2019 SCC  
65 at para 105.  
[368] As for challenges at the decision-making stage, while competent counsel may be able to  
craft arguments in support of judicial review, those arguments would not likely succeed given  
certain fundamental principles of law. Legally, the first hurdle is an obvious one it is not apparent  
on what basis a non-decision would be reviewable absent express language in the enabling  
legislation permitting judicial review of a non-decision: Duitama Gomez v Canada (Public Safety  
and Emergency Preparedness), 2010 FC 593 at paras 8, 30. Where a “decision” under the Act has  
never been made because time limits have been repeatedly extended, there is arguably nothing to  
192  
We recognize that a challenge to the actions of the federal government could be advanced based on an alleged  
breach by the federal government of constitutional obligations it otherwise has.  
Page: 109  
judicially review. Moreover, there is no obligation under the Act to provide reasons for any time  
extensions.  
[369] Nor does it appear likely that a form of mandatory order could be granted by a court to  
compel the Minister or Governor in Council to make a wholly discretionary “decision” under the  
IAA where the time for doing so, as prescribed or as extended, has not finally expired. Nor would  
arguments about an abuse of public office or breach of duty of care likely provide a foundation for  
successful judicial review. These arguments may well be futile where the Minister or Governor in  
Council has simply postponed making a decision. In these circumstances, government inaction  
would not likely ground an action based on abuse of public office or breach of a duty of care.  
[370] Finally, even if a decision has been made by the Minister or Governor in Council, it would  
be legally difficult, if not impossible, to successfully review the exercise of discretion since the  
criteria to be used by the Minister or Governor in Council in making a public interest determination  
are highly subjective. Given the margin of appreciation courts typically extend to government, any  
such decision would not likely be practically amenable to judicial review regardless.193 It must  
also be said that even if judicial review could be sought in theory, the judicial review process  
would, practically speaking, involve no useful interim remedy as the case wound its way through  
the courts.  
[371] In the result, under this legislative regime, the suggestion of judicial review as a remedy  
for federal overreach is neither a practical reality let alone a legal one. In the end, under the IAA,  
“no answer” is a “no” answer, but not a plainly reviewable one.  
D.  
Conclusion Regarding the “Matter” of the IAA  
[372] Our analysis of the purpose and effects of the IAA has led us to conclude that its “matter”  
– its “most important feature”, its “main thrust”, “dominant characteristic”, “essential character”,  
“pith and substance” – is: “the establishment of a federal impact assessment and regulatory regime  
that subjects all activities designated by the federal executive to an assessment of all their effects  
and federal oversight and approval”. This subject matter, and any variation on it, including the  
“establishment of a federal impact assessment and regulatory regime that subjects all intra-  
provincial activities designated by the federal executive to an assessment of all their effects and  
federal oversight and approval”, intrudes fatally into provincial jurisdiction and the provinces’  
proprietary rights as owners of their public lands and natural resources.  
[373] In analyzing the purpose and the effects of the IAA, we have explained the impermissible  
degree of federal jurisdictional overreach thereunder. Canada’s Constitution does not permit this  
193  
Nor is judicial review of the entry into the impact assessment regime a realistic option either. Given the Agency’s  
degree of latitude under s 16(2), including that nothing more is required to trigger the impact assessment than the mere  
possibility that carrying out the designated project may cause certain defined effects, any ability to judicially review  
the entry into this impact assessment regime will also be practically unavailable.  
Page: 110  
hollowing out of provincial powers. We summarize those reasons and the federal overreach as  
follows:  
1. The IAA compels an intra-provincial designated project to  
undergo a wide-ranging impact assessment and subjects the project  
to regulation from inception to completion merely because the  
federal executive has designated it as a designated project.  
2. The IAA gives the federal executive the unilateral right to make  
that designation even where the federal government has no decision-  
making authority vis à vis that project under other valid and  
applicable federal legislation.194  
3. The Act’s self-defined “effects within federal jurisdiction”  
includes effects not within Parliament’s jurisdiction when applied to  
intra-provincial designated projects, namely, the incidental effects  
of provincial laws (authorizing such projects) on a federal head of  
power, effects not linked, or not sufficiently linked, to a federal head  
of power and effects that do not even qualify as significant.  
4. The Act prohibits a proponent of an intra-provincial designated  
project from any conduct that is otherwise lawful for proponents of  
non-designated projects unless the federal executive determines that  
the intra-provincial designated project is in the public interest.  
5. The Act mandates the federal executive to consider all effects of  
an intra-provincial designated project in determining whether the  
project is in the public interest even where those effects are not all  
linked, or sufficiently linked, to a federal head of power.  
6. The Act mandates the federal executive to consider all effects of  
an intra-provincial designated project in determining whether the  
project is in the public interest even where those effects include  
incidental effects of provincial laws on a federal head of power.  
7. The Act permits the federal executive to determine that an intra-  
provincial designated project is not in the public interest even where  
the adverse federal effects caused by that project are not material.  
8. The Act mandates the federal executive to take into account  
mandatory factors in determining whether an intra-provincial  
194  
In other words, where the intra-provincial designated project does not require a federal permit to proceed.  
Page: 111  
designated project is in the public interest, not all of which are linked  
to a federal head of power.  
9. The public interest determination necessarily includes assessing  
whether the intra-provincial designated project overall is in the  
public interest having regard to federal priorities and policies.  
10. A negative public interest determination by the federal executive  
constitutes an effective veto of the intra-provincial designated  
project: the proponent is prohibited from proceeding even if the  
project satisfies, can satisfy, or does not otherwise require, any  
federal permit under other valid and applicable federal legislation.  
11. The Act authorizes the federal executive to impose on an intra-  
provincial designated project whatever conditions it chooses in  
relation to self-defined adverse “effects within federal jurisdiction”  
as part of the decision statement authorizing the project to proceed  
even though the adverse federal effects are not all within federal  
jurisdiction.  
12. The Act permits the federal executive to second guess and veto  
the results of a province’s duty to consult under s 35 of the  
Constitution Act, 1982 with respect to an intra-provincial designated  
project where that duty arises.  
13. The Act authorizes the federal executive to stop an intra-  
provincial designated project even where agreements have been  
made by an Indigenous entity with either or both the provincial  
government and project proponent and with provincial approval.  
XIII. De Facto Expropriation  
[374] The Indian Resource Council raised the issue of expropriation. It argues that the right to  
the use and benefit of minerals on Indian reserve lands is an Aboriginal right protected by s 35 of  
the Constitution.195 While it recognizes that the federal government has the jurisdiction to impact  
on-reserve resources, it contends it can only do so in compliance with the Sparrow test.196 In its  
view, if the federal government wishes to sterilize the development of on-reserve natural resources  
(including oil and gas production), it must expropriate them through a proper process and  
compensate the affected First Nation for the taking of those resources. Given our conclusion that  
195  
This argument was made in oral submissions before this Court.  
196  
Sparrow at 1119 sets out considerations to determine when a s 35 violation can be justified by the Crown, including  
“whether, in a situation of expropriation, fair compensation is available”.  
Page: 112  
the IAA is unconstitutional, we need not address whether s 35 protects against a de facto  
expropriation of natural resources on reserve lands and whether First Nations must be compensated  
by the federal government if that is so.  
[375] Were this legislative scheme upheld, it would arguably raise other issues relating to de  
facto expropriation as well. That would include whether this scheme effectively strips the  
provinces of their proprietary and development rights in their own property, including their natural  
resources. That would raise in turn whether, and at what point, this constitutes a de facto  
expropriation of such property: see Manitoba Fisheries Ltd. v The Queen, [1979] 1 SCR 101; R  
v Tener, [1985] 1 SCR 533.197 And whether the federal government would be attempting to do  
something else indirectly through this legislative scheme that it cannot do directly and that is  
block or stop the development of a province’s natural resources without compensating the province  
for the loss of those resources or its proprietary interests therein. While these issues too await  
another day, we do however note the following.  
[376] The concept of expropriation is that governments have a right to expropriate property  
owned by others for the general, common good. However, since there is no federal power  
authorizing expropriation at large, expropriation by the federal government must be justified under  
some federal head of power: Hogg at §29:5. While the federal government may expropriate  
property owned by the provinces, that expropriation extends only to “the property absolutely  
essential to the Dominion undertaking”: Natural Gas Tax at 1053; see also Nipissing Central  
Railway.  
[377] It is true there is no property right guaranteed under the Canadian Constitution. Therefore,  
the Canadian Constitution does not compel either level of government to compensate parties for  
property they expropriate.198 That has led one judge to state that the admonition “Thou shalt not  
199  
steal” does not apply to governments.  
However, the federal government’s de facto  
expropriation of property owned by the provinces is in a different category altogether. Why?  
Because under s 109 of the Constitution, the proprietary rights of the provinces in public lands  
including their natural resources are expressly guaranteed. These rights were further reinforced by  
197  
Where a statute is regulatory and does not involve a “taking” of property, the general rule is that no compensation  
is payable: Hogg at §29:8; Alberta (Minister of Infrastructure) v Nilsson, 2002 ABCA 283 at para 61. The boundary  
between regulating and taking is an imprecise one. Also, whether what constitutes a constructive taking of provincial  
Crown lands is the same as what constitutes a constructive taking of private property is an open issue. The scope of  
de facto expropriation of private property is on reserve at the Supreme Court: Halifax Regional Municipality v  
Annapolis Group Inc., 2021 NSCA 3, leave to appeal to SCC granted, 39594 (24 June 2021), judgment reserved 16  
February 2022.  
198  
Hogg at §29:8. That said, there is a rule of statutory interpretation that a statute that expropriates private property  
is to be read as requiring compensation to the private owner absent a clear provision to the contrary in the statute:  
Attorney General v De Keyser’s Royal Hotel, [1920] AC 508 (UKHL) at 542.  
199  
Florence Mining Co. v Cobalt Lake Mining Co. (1909), 18 OLR 275 at 279 (HC), cited in Authorson v Canada  
(Attorney General), 2003 SCC 39 at para 53, [2003] 2 SCR 40.  
Page: 113  
the addition of s 92A to the Constitution. Consequently, the federal government would be required  
to compensate a province for the de facto expropriation of any of its natural resources.  
XIV. Classification of the Subject Matter of the IAA  
A.  
Introduction  
[378] We now turn to whether the subject matter of the challenged legislation when applied to  
intra-provincial designated projects falls within the heads of power Canada is relying on to support  
the legislation’s validity: Second Securities Reference at para 86.  
[379] Alberta argues that the IAA has no jurisdictional connection to any federal head of  
constitutional power when applied to intra-provincial designated projects. Canada relies on  
multiple heads of power to support different aspects of this legislative scheme.  
B.  
1.  
Federal Heads of Power  
Federal Triggers Do Not Determine Classification  
[380] Canada submits there are three federal “triggers” that bring a project within the IAA, each  
of which it contends is linked to federal heads of power:  
1. A trigger tied to federal projects, prohibiting a federal authority  
carrying out a project or providing financial assistance to enable a  
project to be carried out on federal lands or outside Canada without  
complying with ss 81-91 of the Act (ss 82-83);  
2. A federal decision-based trigger, arising out of the prohibition on  
a federal authority exercising a power or performing a duty or  
function that could permit a designated project to be carried out  
(s 8); and  
3. An effects-based trigger, arising out of the prohibitions imposed  
on the proponent of a designated project from causing any changes  
to identified matters (s 7).  
[381] Canada’s attempt to equate the “triggers” bringing activities within the IAA to federal heads  
of power is misplaced. The issue is not what “triggers” the IAA but rather whether the subject  
matter of the IAA is properly classified under one or more federal heads of power. In any case,  
both from a legal and practical perspective, the “trigger” which brings an intra-provincial activity  
within the regulatory scheme under the IAA is designation as a designated project.  
Page: 114  
[382] As noted, no one challenges the provisions relating to the first category, federal projects.200  
Regardless, these do not support the constitutionality of the remainder of the challenged  
legislation. As for the second category, we have already explained why the federal jurisdictional  
overreach including the requirement for a positive public interest determination applies with  
equal force to designated projects subject to s 8, that is those requiring a federal permit. Intra-  
provincial designated projects in this second category are subject to the same regulatory scheme  
and federal jurisdictional overreach as those intra-provincial designated projects subject to the s 7  
prohibitions alone. The third category, the effects-based trigger arising out of the prohibitions in s  
7, covers intra-provincial designated projects that do not require a federal permit.  
[383] Canada submits Parliament has jurisdiction to regulate the federal effects of intra-  
provincial designated projects under four heads of federal power: (1) s 91(12) Sea Coast and  
Inland Fisheries; (2) s 132 Imperial Treaties; (3) s 91(24) Indians and Lands Reserved for the  
Indians; and (4) s 91 POGG national concern doctrine.201  
200  
The provisions relating to the first category of prohibitions are contained in a limited and discrete part of the Act  
with a different and less stringent review process from that which applies to “designated projects”.  
201  
Canada also pointed out that “federal lands” are within federal jurisdiction under s 91(1A) of the Constitution Act,  
1867. No one disputed this. Parliament’s jurisdiction over “federal lands” though does not include legislative authority  
over “all effects” on such lands. As noted earlier, a blanket prohibition against “all effects” is no more constitutionally  
valid than a law that prohibits “any effects” on fish.  
Page: 115  
2.  
The Subject Matter of the IAA Is Not Within Federal Heads of Power  
[384] The subject matter of the IAA cannot be classified as falling within federal jurisdiction on  
the basis of the claimed heads of powers, individually or collectively.  
a.  
Section 91(12) Sea Coast and Inland Fisheries  
[385] Canada relies on its jurisdiction over the “Sea Coast and Inland Fisheries” under s 91(12)  
of the Constitution Act, 1867 to “anchor” the prohibitions relating to intra-provincial designated  
projects that cause, or may cause, any effects on fish, fish habitat and aquatic species and the ability  
of the federal executive to decide whether intra-provincial designated projects which have any  
adverse effects thereon should be allowed to proceed.  
[386] Parliament’s power under s 91(12) is not a general power to regulate water pollution. We  
have already explained why Parliament’s claimed jurisdiction to regulate an intra-provincial  
designated project based on any effects of that project on fish, fish habitat and aquatic species –  
even though all such effects are not the subject of prohibitions under the Fisheries Act or Species  
at Risk Act and could not validly be under the division of powers and even though the project does  
not even require a permit under the Fisheries Act or Species at Risk Act constitutes federal  
jurisdictional overreach.  
[387] That overreach also includes Parliament’s authorizing the federal executive to effectively  
veto an intra-provincial designated project based not only on any effects on fish, fish habitat and  
aquatic species but also on mandatory factors not within federal heads of power.202  
[388] In the result, the IAA, when applied to intra-provincial designated projects, is not  
sufficiently linked to any likely harm to the fisheries and, in any event, improperly intrudes into  
provincial heads of power. The subject matter of the IAA does not fall within Parliament’s  
jurisdiction under s 91(12).  
b.  
Section 132 Imperial Treaties  
[389] Canada relies on its jurisdiction under s 132 of the Constitution Act, 1867 to “anchor” the  
prohibitions relating to intra-provincial designated projects that cause, or may cause, any effects  
on migratory birds and the ability of the Minister and Governor in Council to decide whether intra-  
provincial designated projects which have any adverse effects on migratory birds should be  
allowed to proceed.  
202  
Those factors include the “need” for the intra-provincial designated project and “the extent to which the effects of  
the designated project hinder or contribute to the government of Canada’s ability to meet its environmental obligations  
and its commitments in respect of climate change”: Act, s 22(1)(d), s 22(1)(i), s 63(e).  
Page: 116  
[390] Parliament’s power under s 132 is not a general power to regulate air pollution. Again, as  
with the fisheries, Parliament’s claimed jurisdiction to regulate an intra-provincial designated  
project based on any effects of that project on migratory birds even though all such effects are  
not the subject of prohibitions under the Birds Act and could not validly be under the division of  
powers and even though the project may not even require a permit under the Birds Act constitutes  
federal jurisdictional overreach.  
[391] That overreach also includes Parliament’s authorizing the federal executive to effectively  
veto an intra-provincial designated project based not only on any effects on migratory birds but  
also on mandatory factors not within federal heads of power.  
[392] In the result, the IAA, when applied to intra-provincial designated projects, is not  
sufficiently linked to any likely harm to migratory birds and, in any event, improperly intrudes  
into provincial heads of power. The subject matter of the IAA does not fall within Parliament’s  
jurisdiction under s 132.  
c.  
Section 91(24) Indians and Lands Reserved for the Indians  
[393] Canada relies on its jurisdiction over “Indians, and Lands reserved for the Indians” under  
s 91(24) of the Constitution Act, 1867 to “anchor” the prohibitions in s 7(1)(c) and (d) and the  
inclusion of the effects referred to in those sections as “effects within federal jurisdiction”.  
[394] Canada’s position is premised on the proposition it has jurisdiction over an intra-provincial  
designated project otherwise within exclusive provincial jurisdiction as long as the project may  
have any effect on the environment, health, social or economic conditions of Indigenous peoples.  
This too constitutes federal overreach; Parliament’s powers under s 91(24) do not extend this far.  
[395] If Parliament could, as claimed, use any effects on any aspect of the environment, social,  
health or economic conditions of Indigenous peoples to veto, that is stop, any intra-provincial  
designated project, that would negate not only the incidental effects doctrine, but more important,  
provincial powers. Intra-provincial designated projects fall primarily within provincial jurisdiction  
and the fact an intra-provincial designated project may have incidental effects on Indigenous  
peoples does not affect the validity of the provincial legislation nor its application to Indigenous  
peoples.  
[396] The subject matter of the IAA does not fall within Parliament’s jurisdiction under s 91(24).  
d.  
Section 91 National Concern Doctrine Under POGG  
[397] As explained, Parliament’s regulation of “any change” to the environment generally,  
including GHG emissions in particular, that would occur outside the province in which an intra-  
provincial designated project would be carried out or outside Canada from individual intra-  
Page: 117  
provincial designated projects or category thereof within a province, does not fall within the  
national concern doctrine.  
[398] The subject matter of the IAA does not fall within Parliament’s jurisdiction under POGG.  
e.  
Section 91(2) Trade and Commerce  
[399] Three intervenors invoke the trade and commerce power under s 91(2) of the Constitution  
Act, 1867 in support of the constitutionality of this legislative scheme. The intervenors argue that  
the Act assesses and regulates the “effects” of a project related to interprovincial and international  
trade and commerce. Canada did not adhere to this argument in its submissions.  
[400] The test for the trade and commerce power is strict and is not reached by the IAA. For a  
law to engage the federal trade and commerce power, it must be “qualitatively different from  
anything that could practically or constitutionally be enacted by the individual provinces either  
separately or in combination”: Second Securities Reference at para 101, citing A.G. (Can.) v Can.  
Nat. Transportation, Ltd., [1983] 2 SCR 206 at 267; see also General Motors. The Act regulates  
intra-provincial designated projects that the provinces have the ability and jurisdiction to regulate  
under several provincial heads of power. There is no interprovincial commercial activity served  
by this legislative scheme when applied to intra-provincial designated projects.  
[401] The subject matter of the IAA does not fall within Parliament’s trade and commerce power  
under s 91(2).  
f.  
Section 91(27) Criminal Law  
[402] One intervener, Ecojustice Canada Society, argues that s 7 of the Act can also be upheld on  
the basis of Parliament’s criminal law power under s 91(27) of the Constitution Act, 1867. It  
contends s 7 contains all three requirements for classification as criminal law, namely (1) a  
prohibition, (2) accompanied by a penalty, and (3) backed by a criminal law purpose: Genetic  
Non-Discrimination at para 67; Firearms Reference at para 27; Reference re Assisted Human  
Reproduction Act, 2010 SCC 61 at para 35, [2010] 3 SCR 457 [AHRA Reference]. Alberta argues  
the provision is regulatory in nature and, as such, lacks a criminal law purpose. Canada does not  
defend this legislative scheme on the basis of its criminal law power.  
[403] Section 7(1) of the Act constitutes a prohibition in that it prohibits a proponent of a  
designated project from causing certain enumerated effects, subject to meeting one of the  
conditions set out in s 7(3). That the prohibition allows for exceptions rather than being absolute  
in nature is not inconsistent with criminal law: AHRA Reference at para 36; Firearms Reference  
at para 39. Moreover, breach of s 7 constitutes an offence under s 144(1)(a) and is backed up by a  
penalty in s 144(2)-(4). The first two requirements are therefore met.  
Page: 118  
[404] The point of contention is whether s 7 contains a criminal law purpose. A law will have  
such a purpose “if it addresses an evil, injurious or undesirable effect on a public interest  
traditionally protected by the criminal law, or another similar public interest”: Genetic Non-  
Discrimination at para 74 (per Karakatsanis J), para 137 (per Moldaver J). These public interests  
have traditionally included peace, order, security, health and morality: Genetic Non-  
Discrimination at para 68. The list also includes the protection of the environment: Hydro-Québec  
at para 43 (per Lamer CJ and Iacobucci J), paras 123, 127 (per La Forest J). However, there must  
be some degree of threat of harm to the public interest in question for the prohibition to be criminal  
in nature: Genetic Non-Discrimination at paras 68, 75, 78-79.  
[405] Under this legislative scheme, the prohibition in s 7 is not limited to protecting against  
objectively “harmful effects” to the environment. Rather, s 7 prohibits any change to various  
components of the environment. The prohibited conduct is also defined in too excessively broad a  
manner and with too remote a potential of harm to avoid the constitutional infirmities of vagueness  
or overbreadth were it found to be criminal law: R v Nova Scotia Pharmaceutical Society, [1992]  
2 SCR 606.  
[406] Moreover, conduct lawful for others is prohibited merely because the proponent’s proposed  
project has been “designated”. The criminal law is necessarily a law of national effect. Centuries  
of tradition make plain that the criminal law does not contemplate a checkerboard of criminal  
liability depending on whether a proponent’s project has been “designated”. Limiting the  
prohibitions to designated projects based on size or specific industries within Canada is a central  
feature of s 7. That is a patent indication of a purely regulatory law.  
[407] In any event, the IAA does not declare crimes, prosecute and punish accordingly. Instead,  
the federal executive is authorized to let the proponent of the designated project proceed. Or not.  
And if it permits it to proceed, it might require the proponent to comply with imposed conditions.  
Or not. Where a prohibition is confined to ensuring compliance with a legislative scheme rather  
than independently serving the public interest, it will be regulatory rather than criminal in nature:  
Firearms Reference at para 38.203 The s 7 prohibition and accompanying penalties are merely  
ancillary to the regulatory regime created by the IAA itself.  
[408] In summary, the IAA is regulatory in nature. Its subject matter does not fall within  
Parliament’s criminal law power under s 91(27) of the Constitution Act, 1867.  
203  
A statute can be regulatory even in the face of a prohibition coupled with a penalty. As explained by Lamer CJ and  
Iacobucci J (dissenting but not on this point) in Hydro-Québec at para 46: “Any regulatory statute that lacked ...  
prohibitions and penalties would be meaningless. However, ... the penalties that are provided in a regulatory context  
serve a ‘pragmatic’ or ‘instrumental’ purpose and do not transform the legislation into criminal law”.  
Page: 119  
C.  
1.  
Provincial Heads of Power  
Introduction  
[409] The subject matter of the IAA, when applied to intra-provincial designated projects, falls  
squarely within several heads of provincial power.  
2.  
Intra-Provincial Designated Projects Fall Within Provincial Heads of Power  
[410] That the real “matter” of the Act overshoots the bounds of federal jurisdiction when applied  
to intra-provincial designated projects is clear. As noted, provincial governments can turn to  
several provincial heads of power to regulate all aspects of intra-provincial designated projects:  
s 92A(1), development and management of natural resources; s 109, proprietary rights as owners  
of public lands; s 92(10), local works and undertakings; s 92(5), management of public lands;  
s 92(13), property and civil rights; and s 92(16), local or private matters.  
a.  
Section 92A Development and Management of Natural Resources  
[411] Under the Resource Amendment, s 92A, each provincial Legislature has the exclusive  
jurisdiction to manage and develop its 92A natural resources for the benefit of its present and  
future residents. This is one of the powers provincial Legislatures can rely on, along with s 92(10),  
s 92(13) and s 92(16) when acting as legislator, as opposed to owner, of privately-owned natural  
resources.  
[412] Provincial powers under s 92A(1) include determining terms and conditions under which  
industry will or will not be permitted to develop its s 92A natural resources in the province.  
That necessarily includes the conditions a province may choose to impose regarding those  
operations, including regulating their GHG emissions.  
[413] Section 92A extends not only to the provinces’ legislative authority over non-Crown-  
owned natural resources. It also explicitly authorizes the exercise of the provinces’ proprietary  
rights.204 No exploration for 92A natural resources can be undertaken without provincial permits.  
No intra-provincial designated project to develop those resources can be constructed or operated  
on provincial lands or provincially-controlled lands without provincial permits.  
b.  
Section 109 Proprietary Rights as Owners of Public Lands  
[414] Section 92A is not the only power the provinces have with respect to the development of  
their natural resources. To this must be added the provinces’ proprietary rights as owners of their  
204  
As explained in Moull at 419: “It is noteworthy that, at least partially in recognition of the potency ascribed to  
provincial Crown proprietary rights, subsection 92A(6) expressly preserves not only all pre-existing provincial  
legislative powers but also all pre-existing provincial government ‘rights’ as well.”  
Page: 120  
natural resources under s 109 of the Constitution. These rights clearly extend to regulation of  
resources before, during and after recovery from the ground.  
[415] A province’s proprietary rights along with its exclusive powers under s 92A(1) include the  
right to exploit its natural resources. As the Supreme Court stated in Natural Gas Tax at 1080:  
“The allocation in 1930, by agreement and constitutional amendment, of property to the Crown in  
the right of the Province of Alberta necessarily carries with it the right of the province to the  
proceeds of disposition in the words of Duff J to ‘enjoy the fruits of that property’. The resources  
were intended to be an important source of revenue, indeed the basis of the provincial financial  
integrity, and therefore must be capable of realization” (emphasis added). Section 92A(1) put this  
beyond doubt when it comes to the 92A natural resources since it expressly guarantees the  
provinces the exclusive right to “development” of those resources.  
c.  
Section 92(5) Management of Public Lands  
[416] Under s 92(5) of the Constitution Act, 1867, provincial Legislatures have the jurisdiction  
to determine the conditions under which a party is entitled to use public lands, whether as a lessee  
or otherwise. Provincial legislative powers under this section extend to making laws in relation to  
management of public lands, including laws relating to environmental impact assessments and the  
regulation of natural resources, including GHG emissions therefrom.205  
d.  
Section 92(10) Local Works and Undertakings  
[417] Under s 92(10) of the Constitution Act, 1867, provincial Legislatures have exclusive  
jurisdiction over local works and undertakings. Local works and undertakings, which include  
projects for the development and management of natural resources, are subject to provincial  
jurisdiction unless the work or undertaking falls within one of the exceptions under s 92(10)(a),  
(b) or (c). “Local regulation is the rule; federal regulation, the exception”: Consolidated Fastfrate  
Inc. v Western Canada Council of Teamsters, 2009 SCC 53 at para 31, [2009] 3 SCR 407  
[Fastfrate]. 206 The generation and distribution of hydroelectricity falls within provincial  
jurisdiction since dams, generating stations and distribution systems constitute local works and  
undertakings: Fulton et al v Energy Resources Conservation Board, [1981] 1 SCR 153.  
e.  
Section 92(13) Property and Civil Rights  
[418] Under s 92(13), property and civil rights, one of the broadest areas of provincial jurisdiction  
under the Constitution Act, 1867, provincial Legislatures also have the power to regulate industry  
205  
For private lands, s 92(13), property and civil rights, gives the provinces power to make comparable laws.  
206  
The rationale for this, cited in Fastfrate at para 33, was explained in 1865 by then Attorney General John A.  
Macdonald: “... the local legislatures have the control of all local works; and it is a matter of great importance ... that  
each province will have the power and means of developing its own resources and aiding its own progress after its  
own fashion and in its own way.”  
Page: 121  
in the province, except for those industries within federal jurisdiction. This power includes  
regulating land use and emissions that could pollute the environment: Hogg at §30:33. The  
provinces’ powers over nuisance and trespass, and that would include the regulation of GHG  
emissions, as a subset of their exclusive jurisdiction over property and civil rights, have long been  
recognized. The provinces’ power under s 92(13) also includes the control and regulation of local  
trade and commerce generally: Re: Anti-Inflation Act, [1976] 2 SCR 373 at 452-453, per Beetz J  
(in dissent but not on this point).  
[419] While transportation is not mentioned in the Constitution Act, 1867, provincial Legislatures  
have jurisdiction over intra-provincial modes of transportation, including roadways funded by the  
province or by municipalities under provincially-delegated power, under s 92(13), as well as  
s 92(10) and s 92(16). That is so even if the roadway is physically connected to other roadways  
that extend beyond the limits of the province.  
f.  
Section 92(16) Local or Private Matters  
[420] This head of power covers matters of a merely local or private nature in the province. There  
is nothing “mere” though about s 92(16) legislative jurisdiction. It completes the constitutional  
design of an exhaustive distribution of legislative jurisdiction and constitutes an express deduction  
from federal legislative jurisdiction.  
D.  
Conclusions on Classification  
[421] The subject matter of the IAA, when applied to intra-provincial designated projects, falls  
within several heads of provincial power. The federal jurisdictional overreach is manifest. Despite  
the blending of federal points of interest with the parts of the IAA challenged here, the IAA  
constitutes a profound invasion into provincial legislative jurisdiction and provincial proprietary  
rights. Parliament’s claimed power to regulate all environmental and other effects of intra-  
provincial designated projects improperly intrudes into industrial activity, resource development,  
local works and undertakings and other matters within provincial jurisdiction.  
[422] The division of powers exists for a reason: Attorney General of Nova Scotia v Attorney  
General of Canada, [1951] SCR 31. Under this Act, the federal government is aggrandizing onto  
itself decisions vis à vis intra-provincial designated projects which the citizens of individual  
provinces rightly expect and the Constitution requires will be made by those directly  
accountable to those citizens, and that is the provincial government of the province in which they  
live.  
[423] If upheld, the IAA would reduce the plainly applicable provisions of s 92A, s 92(5),  
s 92(10), s 92(13), s 92(16) and s 109 to a subordinate status to federal authority. The unavoidable  
effect of the IAA would be the centralization of the governance of Canada to the point this country  
would no longer be recognized as a real federation. This is not what the framers of our Constitution  
Page: 122  
intended. And it is certainly not what provincial governments agreed to either on patriation of the  
Constitution.  
[424] Where natural resources are involved, it is each province that is concerned with the  
sustainable development of its natural resources, not the federal government. It is the province that  
owns those natural resources, not the federal government. And it is the province and its people  
who lose if those natural resources cannot be developed, not the federal government. The federal  
government does not have the constitutional right to veto an intra-provincial designated project  
based on its view of the public interest. Nor does the federal government have the constitutional  
right to appropriate the birthright and economic future of the citizens of a province.  
Page: 123  
XV. Conclusion on Validity of the IAA and Severance  
[425] For these reasons, we have concluded that the IAA is ultra vires Parliament.  
[426] Canada maintains the IAA is not severable and ought to stand or fall as a whole. We agree.  
In our view, it would not be possible to practically sever offending provisions from the Act. Nor  
does severing the part implementing the Act, that is the Regulations, make sense. The two are  
inextricably linked. This Court cannot fairly conclude that Parliament would have enacted this  
scheme without including therein intra-provincial designated projects: Ontario (Attorney  
General) v G, 2020 SCC 38 at paras 112-114. Thus, this Court cannot simply strike from the  
Regulations all intra-provincial designated projects.  
[427] Further, severing the Regulations would not address the overreach in the Act itself nor  
preclude, in any event, the adoption of new, equally problematic, regulations. Therefore, severance  
is not a remedy in these circumstances.  
XVI. Interjurisdictional Immunity  
[428] Alberta and Saskatchewan invoke, as an alternative argument, the doctrine of  
interjurisdictional immunity.207 Under this doctrine, an otherwise valid law will be inapplicable to  
the extent it impairs the “core”, that is “basic, minimum and unassailable content”, of a head of  
power falling under the jurisdiction of the other level of government: Desgagnés Transport at  
paras 90-93. That is so especially where the effect is on “circumscribed areas of activity”: Guy  
Régimbald & Dwight Newman, The Law of the Canadian Constitution, 2nd ed (Toronto:  
LexisNexis, 2017) at 210, citing Canada (Attorney General) v PHS Community Services Society,  
2011 SCC 44 at para 60, [2011] 3 SCR 134 [Insite]. The impairment test is “a midpoint between  
sterilization and mere effects”: Quebec (Attorney General) v Canadian Owners and Pilots  
Association, 2010 SCC 39 at para 44, [2010] 2 SCR 536.  
[429] To date, this doctrine has been used to protect the core of federal powers: Insite at para 60;  
Canadian Western Bank at para 45. But as the Supreme Court confirmed in Insite at para 65, this  
doctrine should work both ways, that is in favour of the provinces as well as the federal  
government.208 It would be unfair indeed if the federal government, with all its constitutional  
advantages, were permitted to rely on this doctrine but the provinces could not: Hogg at §15:21.  
The result would be a ratchet that turns one way only, in favour of the federal government and  
207  
As the Supreme Court indicated in Insite at para 65, “before applying the doctrine of interjurisdictional immunity  
in a new area, courts should ask whether the constitutional issue can be resolved on some other basis.” We accordingly  
began by resolving the constitutionality of the IAA on the basis of the pith and substance and validity analysis.  
208  
The Supreme Court had earlier signalled the doctrine should also apply in favour of the provinces: Canadian  
Western Bank at para 35. Some argue that rather than extend the doctrine in favour of the provinces, the courts should  
instead read down federal legislation to keep it within federal jurisdiction: Jonathan Penner, “The Curious History of  
Interjurisdictional Immunity and Its (Lack of) Application to Federal Legislation” (2011) 90:1 Can Bar Rev 1 at 20-  
21, 26; Honickman at 236-239.  
Page: 124  
against the provinces. Not only are the provincial powers under s 92 just as “exclusive” as the  
federal ones under s 91, so too are the provincial powers under s 92A(1). Thus, “each provincial  
head of power, no less than each federal head of power, has a ‘basic, minimum and unassailable  
content’ that is immune from incursion by the other level of government”: Hogg at §15:21.  
[430] While we have concluded that the IAA is ultra vires, alternatively, if this legislative scheme  
were ultimately found to be constitutionally valid, the doctrine of interjurisdictional immunity  
should apply to protect what constitutes the “core” of relevant provincial heads of power. The Act  
and Regulations seriously and significantly impair provincial powers under s 92A(1), s 92(5),  
s 92(10), s 92(13), s 92(16) and s 109. However, what constitutes the “core” of each of these  
provincial heads of power was not sufficiently addressed to permit this Court to definitively  
resolve all aspects of the application of this doctrine and we decline to do so.  
XVII. Conclusion  
[431] The IAA is ultra vires Parliament.  
[432] As noted, intra-provincial activities are not immune from federal government regulation  
providing that regulation remains within the constitutional dividing lines. Therefore, intra-  
provincial designated projects that require a federal permit under other valid and applicable federal  
laws remain subject to those laws but in accordance with the terms of such laws, not this legislative  
scheme.  
[433] We would add this. Legitimate concerns about the environment and climate change shared  
by all Canadians and provincial governments as well as the federal government do not justify  
overriding our existing form of federalism and the division of powers. If the federal government  
believes otherwise, it should make the case for an increase in its jurisdiction to the Canadian public.  
Constitutional change should be effected as the Constitution requires by agreement amongst the  
federal and provincial governments.  
[434] We ought never lose sight of the great genius of our constitutional structure which has  
produced a free and secure democracy, one that has served Canadians well for 155 years. Our  
ancestors chose a federal, not unitary, structure for a purpose to unify separate colonies and  
create a country. The negotiated division of powers lies at the heart of what makes this country  
what it is, and why, despite significant tensions from time to time, Canada has been able to survive  
Page: 125  
and prosper since Confederation. It remains one of this country’s greatest strengths. It will continue  
to benefit present and future generations as we face the environmental, economic and security  
challenges ahead providing that we respect the principles on which Canada has been founded:  
federalism, responsible government and the Rule of Law.  
Special Hearing heard February 22-25, 2021  
Opinion filed at Calgary, Alberta  
this 10th day of May, 2022  
________________________________________  
Fraser C.J.A.  
________________________________________  
Watson J.A.  
________________________________________  
McDonald J.A.  
Page: 126  
Strekaf, JA:  
[435] I have reviewed the Opinion of Fraser C.J.A., Watson J.A. and McDonald J.A. and agree  
with the analysis and conclusions expressed therein with the exception of paragraphs 374 to 377  
about which I make no comment.  
Special Hearing heard February 22-25, 2021  
Opinion filed at Calgary, Alberta  
this 10th day of May, 2022  
________________________________________  
Strekaf J.A.  
Page: 127  
Paragraph  
Table of Contents  
I.  
II.  
Introduction ............................................................................................................[436]  
History of Canadian Environmental Assessment Legislation ...................................[452]  
A.  
B.  
C.  
D.  
EARPGO or the Guidelines Order.................................................................[453]  
Canadian Environmental Assessment Act, 1992 ...........................................[458]  
Canadian Environmental Assessment Act, 2012 ...........................................[465]  
IAA and Regulation........................................................................................[471]  
III.  
The Legislative Scheme of the IAA and Regulation ..................................................[474]  
A. The IAA: Title, Preamble, Purpose, and Impact Assessment Regime ...........[474]  
1.  
2.  
The Title, Preamble and Stated Purpose............................................[474]  
The Impact Assessment Regime........................................................[477]  
a.  
b.  
Section 7 and the Regulation’s Project List...........................[481]  
Phase I. The Planning Phase ..................................................[493]  
i.  
Proponent and Agency steps to determine if  
an impact assessment is necessary: ss 10-15 .............[493]  
The Agency’s decision as to whether an impact  
assessment is necessary: s 16.....................................[494]  
ii.  
c.  
d.  
Phase II. The Impact Statement .............................................[497]  
Phase III. The Impact Assessment.........................................[499]  
i.  
The impact assessment report considers adverse  
effects and adverse or incidental effects of a  
designated project ......................................................[501]  
Substitution and delegation of impact assessment.....[503]  
Impact assessment by a review panel ........................[507]  
ii.  
iii.  
e.  
Phase IV. The Decision..........................................................[509]  
i.  
Minister’s decision.....................................................[509]  
Referral to Governor in Council ................................[510]  
The Governor in Council’s Decision .........................[511]  
The Decision must consider the s 63 Factors.............[512]  
Projects by federal authorities....................................[515]  
ii.  
iii.  
iv.  
v.  
B.  
Distribution of Legislative Powers Under the Constitution Act, 1867 ......................[524]  
Analysis ............................................................................................................[525]  
A. General Principles..........................................................................................[525]  
What Has Changed: Comparing CEAA, 2012 vs IAA Project Lists ..............[517]  
IV.  
V.  
1.  
The Architectural Design of the Constitution Act, 1867:  
Federalism..........................................................................................[525]  
The Subject of the Environment: A “Matter” that Falls within both  
Federal and Provincial Heads of Constitutional Authority................[527]  
2.  
Page: 128  
3.  
4.  
Federal and Provincial Regulation of Environmental Effects:  
Cooperative Federalism .....................................................................[540]  
The Presumption of Constitutionality................................................[548]  
B.  
Validity of the IAA and Regulation................................................................[550]  
1. Characterization.................................................................................[557]  
a.  
b.  
Purpose of the IAA and Regulation........................................[567]  
i.  
ii.  
iii.  
Intrinsic evidence.......................................................[567]  
Extrinsic evidence......................................................[572]  
Conclusion as to purpose of the IAA and  
Regulation..................................................................[582]  
Effects of the IAA and Regulation .........................................[583]  
i.  
The effects of the IAA and Regulation shown  
through s 7 and the Project List .................................[584]  
The effects of the IAA and Regulation shown through  
the environmental assessment process.......................[586]  
The effects of the IAA shown through decision-making:  
authorization of projects in the public interest...........[589]  
Conclusion as to effects of the IAA and Regulation ..[590]  
ii.  
iii.  
iv.  
c.  
Conclusion as to Pith and Substance of the IAA and  
Regulation..............................................................................[591]  
2.  
Classification......................................................................................[594]  
a.  
b.  
c.  
Matters in the IAA Regulation Project List prima facie  
Within s 91 of the Constitution Act, 1867..............................[599]  
Matters in the IAA Regulation Project List prima facie  
Within s 92 of the Constitution Act, 1867..............................[601]  
Section 7 and the Regulation: Environmental Effects upon  
Areas of Federal Jurisdiction .................................................[602]  
i.  
Section 7(1)(a)(i) change to fish and fish habitat, as  
defined in s 2(1) of the Fisheries Act, within the  
legislative authority of Parliament: the Fisheries  
Power under s 91(12) of the Constitution Act, 1867..[613]  
Section 7(1)(a)(ii) change to aquatic species, as  
defined in ss 2(1) of the Species at Risk Act, within the  
legislative authority of Parliament: the Fisheries Power  
under s 91(12) of the Constitution Act, 1867.............[621]  
Section 7(1)(a)(iii) change to migratory birds, as  
defined in ss 2(1) of the Migratory Birds Convention  
Act, 1994, within the legislative authority of Parliament:  
Imperial Treaty Power under s 132 of the Constitution  
Act, 1867 ....................................................................[625]  
ii.  
iii.  
Page: 129  
Section 7(1)(a)(iv) change to components of the  
iv.  
environment within the legislative authority of Parliament:  
any other component of the environment set out in  
Schedule 3..................................................................[631]  
Section 7(1)(b)(i) change to the environment on  
federal lands...............................................................[632]  
Section 7(1)(b)(ii) change to the environment in  
another province: POGG and s 91 of the Constitution Act,  
1867............................................................................[633]  
Section 7(1)(b)(iii) change to the environment  
v.  
vi.  
vii.  
outside Canada: POGG and s 91 of the  
Constitution Act, 1867 ...............................................[640]  
viii. Section 7(1)(c)(i)-(iii) change to the environment of  
Indigenous Peoples, with impact on ..........................[643]  
a)  
b)  
physical and cultural heritage. .......................[643]  
the current use of lands and resources for  
traditional purposes........................................[643]  
any structure, site or thing that is of historical,  
archeological, paleontological, or architectural  
significance ..................................................[643]  
c)  
ix.  
Section 7(4) the proponent may cause a change  
referred to in s 7(1)(d) in relation to Indigenous  
peoples that hold rights affirmed by s 35 of the  
Constitution Act, 1982 if the change is not adverse  
and the Indigenous peoples and proponent agree the  
act or thing may be done............................................[656]  
d.  
e.  
Section 8: Federal Decisions..................................................[658]  
Sections 81-83: Federal Projects on Federal Lands and  
Projects Outside Canada ........................................................[659]  
Sections 32-33 of the Regulation Schedule: GHG  
f.  
Emissions may be “Effects” in Federal Jurisdiction; and  
Identify Threshold Levels for Project Inclusion on the  
Project List.............................................................................[660]  
Project-Based Assessment: An External Legislative  
g.  
Trigger (Affirmative Regulatory Duty) tied to a Specific  
Head of Power is not a Constitutional Prerequisite ...............[671]  
Review of all Aspects of a Project is Permitted.....................[684]  
A Project in the Public Interest vs all Aspects of a  
h.  
i.  
Project in the Public Interest..................................................[690]  
i.  
Consideration of broad factors in federal  
Page: 130  
decision-making is constitutional ..............................[695]  
Consideration of broad factors in federal  
ii.  
decision-making does not mean the decision –  
the public interest determination extends beyond  
effects within federal jurisdiction...............................[698]  
j.  
Materiality and the Incidental Effects Doctrine.....................[703]  
k.  
IAA: Cooperative Federalism, not Federal Veto....................[710]  
i.  
IAA strengthens control over environmental effects in  
federal jurisdiction .....................................................[718]  
Federal and provincial decision-makers make different  
decisions, rather than a “veto” of one by the other....[721]  
The approach that a project cannot proceed as proposed  
without endorsement by both levels of government has  
been in place since at least Oldman River .................[722]  
The IAA and EPEA are designed to facilitate cooperation  
rather than a competitive veto, one over the other.....[723]  
Section 92A(1): Exclusive Jurisdiction over Natural  
Resources? .................................................................[731]  
ii.  
iii.  
iv.  
v.  
3.  
Conclusion as to Validity of the IAA and Regulation........................[740]  
C.  
Inter-Jurisdictional Immunity ........................................................................[742]  
1.  
2.  
Issue not Raised by Reference Questions ..........................................[742]  
If the Application of the Doctrine of Interjurisdictional Immunity is  
Not Beyond the Reference Scope, In Any Event, It Does  
Not Apply Here..................................................................................[748]  
VI.  
Conclusion ............................................................................................................[760]  
Page: 131  
Greckol J.A. (Dissenting):  
I. Introduction  
[436] The Government of Alberta seeks this Court’s opinion on the constitutionality of the  
Impact Assessment Act, SC 2019, c 28, s 1 [IAA] and one of its associated regulations, the Physical  
Activities Regulations, SOR/2019-285 [the Regulation].  
[437] Briefly stated, the IAA establishes a federal environmental assessment regime that  
facilitates planning and information-gathering mostly in relation to “designated projects”, these  
being certain physical activities largely as outlined in the Regulation. Projects listed in the  
Regulation cover a wide range of areas, including not only those clearly within federal jurisdiction  
(e.g., certain activities in national parks) but also those like in situ oil sands extraction facilities,  
which, though they may have environmental impacts that fall within federal jurisdiction, are  
themselves regulated provincially. The legislative scheme is ultimately concerned with whether  
such projects may cause certain “adverse effects” said to be within the legislative authority of  
Parliament, and if so, whether those effects are in “the public interest”. With that end in mind, the  
IAA sets out a process whereby designated projects are prohibited from causing a number of  
changes to the environment unless and until it is determined that i) an assessment is not necessary  
or ii) an assessment of the proposed project is undertaken and, on that basis, the Minister or  
Governor in Council is able to conclude that any so-called “effects within federal jurisdiction” that  
may be caused by the proposed project are in the public interest.  
[438] The questions posed by Alberta in this Reference are set out in the Order in Council:  
1. Is Part 1 of An Act to enact the Impact Assessment Act and the Canadian Energy  
Regulator Act, to amend the Navigation Protection Act and to make consequential  
amendments to other Acts, S.C. 2019, c. 28, unconstitutional in whole or in part, as  
being beyond the legislative authority of the Parliament of Canada under the  
Constitution of Canada?  
2. Is the Physical Activities Regulations, SOR/2019-285, unconstitutional in whole or in  
part by virtue of purporting to apply to certain activities listed in Schedule 2 thereof  
that relate to matters entirely within the legislative authority of the Provinces under the  
Constitution of Canada? (160/2019)  
[439] Bill C-69, entitled An Act to enact the Impact Assessment Act and the Canadian Energy  
Regulator Act, to amend the Navigation Protection Act and to make consequential amendments to  
other Acts, SC 2019, c 28, consists of four parts. The IAA is Part 1 of Bill C-69 and is the enabling  
legislation of the Regulation. No other part of Bill C-69 is at issue in this Reference.  
[440] Several points should be borne in mind as a prelude to considering this Reference.  
Page: 132  
[441] First, the majority, Alberta, and the intervenors, do not disagree that a significant portion  
of the legislative scheme involves matters within federal jurisdiction. The Project List in the  
Schedule of the Regulation includes the following uncontentious areas: national parks and  
protected areas (ss 1-11); defence (ss 12-17); uranium mines or mills (ss 20-23); nuclear facilities  
(ss 26-28); offshore oil and gas facilities (ss 34-36); international or interprovincial power lines  
(ss 39); offshore oil and gas pipelines and renewable energy (ss 40, 44-45); aerodromes or runways  
(ss 46-47); international or interprovincial bridges or tunnels (s 48); canals or causeways in  
navigable waters (ss 49-50); and marine terminals (ss 52-53). And even with respect to these  
activities, the central provision of the IAA (s 7) is limited to changes with effects in the following  
areas said to be within federal jurisdiction: fish and fish habitat, aquatic species, migratory birds,  
federal lands, trans-provincial effects, and certain effects upon Indigenous peoples. Nor is any  
issue taken with ss 81-91 of the IAA, which provides for the assessment of projects (even where  
not designated) on federal lands and outside Canada.  
[442] What is left to consider and what this Reference is about is whether it is constitutionally  
permissible for a federal project-based environmental assessment regime to regulate “effects”  
(defined in s 2 to include “changes to the environment or to health, social or economic conditions  
and the positive and negative consequences of these changes”) on purported areas of federal  
jurisdiction caused by certain designated projects where the projects themselves otherwise fall  
within provincial jurisdiction, as follows:  
s 92(10) of the Constitution Act, 1867 as involving:  
i)  
“Local Works and Undertakings” (new public highways that require 75 km  
or more of new right of way in s 51 of the Regulation Schedule; certain  
railways and railway yards in ss 54-55 of the Regulation Schedule).  
s 92A(1) of the Constitution Act, 1867 as involving:  
i)  
The “exploration ... development, conservation and management of non-  
renewable natural resources ... in the province” (mines and metal mills in ss  
18-19, 24-25 of the Regulation Schedule; oil, gas, and other fossil fuel  
facilities in ss 30-33, ss 37-38 of the Regulation Schedule); and  
ii)  
The “development, conservation and management of sites and facilities in  
the province for the generation and production of electrical energy”  
(renewable energy in ss 42-43 of the Regulation Schedule).  
[443] In my opinion, the IAA and its Regulation are a valid exercise of Parliament’s authority to  
legislate on the matter of the environment. Section 7 of the IAA prohibits proponents of physical  
activities or designated projects on the Regulation Project List from doing anything to advance the  
project if it may cause defined effects in federal jurisdiction. Most of the designated projects  
involve activities within areas of federal jurisdiction and prima facie within s 91 of the Constitution  
Page: 133  
Act, 1867 such as national parks, interprovincial railways, and offshore oil and gas facilities –  
that may have effects upon areas also within federal jurisdiction, such as fish habitat, federal lands,  
or Indigenous peoples. The remainder of the designated projects are intra-provincial and prima  
facie within s 92 of the Constitution Act, 1867 such as mines and metals, and oil and gas facilities  
that may have effects upon areas of federal jurisdiction, such as fish habitat, federal lands, or  
Indigenous peoples. In either case, the project-based federal environmental assessment regime in  
the IAA and Regulation target effects in federal jurisdiction.  
[444] Second, at least five important legal points already established by the Supreme Court of  
Canada provide a useful backdrop to this Reference:  
1. The environment “is a diffuse subject that cuts across many different areas of constitutional  
responsibility, some federal, some provincial”: R v Hydro-Québec, [1997] 3 SCR 213 at  
para 112, 151 DLR (4th) 32 [Hydro-Québec]; see also Friends of the Oldman River Society  
v Canada (Minister of Transport), [1992] 1 SCR 3 at 63-64, 88 DLR (4th) 1 [Oldman River  
cited to SCR];  
2. Some local projects will have both a provincial aspect and a federal aspect: Oldman River  
at 69; Quebec (Attorney General) v Moses, 2010 SCC 17 at para 36, [2010] 1 SCR 557  
[Moses]. As noted by La Forest J in Oldman River at 69, “[a]lthough local projects will  
generally fall within provincial responsibility, federal participation will be required if the  
project impinges on an area of federal jurisdiction”. Accordingly, “[t]he effect of the  
Oldman River decision is to confer on the federal Parliament the power to provide for  
environmental assessment of any project that has any effect on any matter within federal  
jurisdiction”: Peter W. Hogg & Wade K. Wright, Constitutional Law of Canada, 5th ed  
supplemented (Toronto: Thomson Reuters, 2021) (loose-leaf updated 2021) at § 30.32  
[Hogg] [emphasis added];  
3. Due to this overlap, both federal and provincial environmental assessment regimes can  
apply to a given project, which has been held to be “neither unusual nor unworkable”:  
Quebec (Attorney General) v Canada (National Energy Board), [1994] 1 SCR 159 at 193,  
112 DLR (4th) 129 [National Energy Board cited to SCR]. Environmental assessments  
have accordingly come to contemplate a cooperative approach to protecting the  
environment through shared impact assessment responsibilities between jurisdictions,  
including by means of bilateral agreements between individual provinces and the federal  
government;  
4. A federal environmental assessment regime applicable to local projects is permitted to  
review and assess the entire project as proposed by a proponent rather than simply the  
scope of the project thought to fall within federal jurisdiction: MiningWatch Canada v  
Canada (Fisheries and Oceans), 2010 SCC 2, [2010] 1 SCR 6 [MiningWatch]; and  
Page: 134  
5. There is no constitutional imperative that environmental assessment legislation use a  
particular trigger to initiate a federal assessment, such as the “affirmative regulatory duty”  
described in Oldman River: Moses at para 13, aff’g 2008 QCCA 741 at paras 93-115.  
[445] Third, following up on this last point, with respect, neither the majority nor Alberta nor  
any other interested party has provided a clear explanation as to why it is constitutionally  
impermissible for Canada to move from an environmental assessment process triggered by an  
external statute rooted in a named federal head of constitutional authority (such as that considered  
in Oldman River) to a project-based environmental assessment approach where the environmental  
assessment legislation is itself rooted in heads of constitutional power, limiting its reach to  
environmental effects in federal jurisdiction, if indeed it does so. A democratically elected  
Parliament is free to design an environmental protection approach of its choice, so long as it acts  
within constitutional constraints. Indeed, it would be surprising if it did not change that approach  
to meet the challenges of the ever-increasing threat posed by environmental degradation and the  
climate crisis. Some might call this progress. In any event, Canada’s choice of approach to  
environmental issues is an expression of the will of the people; Canadians are often in the vanguard  
of progress on the fundamental social issues of our times.  
[446] Fourth, natural resource projects are not an enclave of exclusive provincial jurisdiction for  
all purposes, including environmental protection, immune from federal consideration. A province  
and the industries contained therein cannot exist in splendid isolation. While the division of powers  
contemplates that the provinces are constitutionally entitled to be master of their commercial ship  
and captain of their resource fate, Canada is a federation comprised of a complex matrix of  
jurisdictions: federal, provincial, Indigenous groups, territorial, regional, and local governments,  
each with their own environmental interests. With respect to the federal and provincial  
governments, this is what was meant when La Forest J described the environment as “a  
constitutionally abstruse matter which does not comfortably fit within the existing division of  
powers without considerable overlap and uncertainty”: Oldman River at 64.  
[447] Oversight of environmental impacts cannot be the monopoly of one level of government,  
as environmental impacts are ubiquitous, touching upon a multiplicity of diverse interests, from  
an individual project’s sometimes minor effects upon limited numbers of people at a community  
level to cumulative effects that attain the magnitude of existential threat to all peoples at a global  
level. Canadians might be surprised, or even alarmed, by the notion that natural resources projects  
such as in situ oil sands extraction facilities are immunized from federal environmental regulation.  
[448] Within this country, Canada geese will fly over tailings ponds north of Fort McMurray  
without heed of jurisdiction. Fisheries will be disrupted by damming waterways or constructing  
pipelines that transcends provincial boundaries. Effluent from a potash mine in Saskatchewan may  
affect the health of Québécois or Indigenous peoples living downstream along a river system that  
has no regard for provincial borders. A proposed coal strip mining operation on the borders of  
Banff or Jasper National Park may affect the roaming elk herds whose breeding grounds are deep  
within the Parks or may contaminate the headwaters of rivers meant to provide clean drinking  
Page: 135  
water to Alberta ranchers and Indigenous communities. An oil spill in Clayoquot Sound may  
contaminate beaches in the wilderness beloved by Canadians, jeopardize the livelihood of local  
Indigenous peoples, disrupt the tourism economy of Tofino residents, and pollute coastlines  
abroad. Environmental concerns engage the interests of a complex matrix of jurisdictions and all  
Canadians, affecting the air we breathe, the water we drink, the food we eat, and are best addressed  
as the shared responsibility of all levels of government, with Indigenous peoples the first among  
equals, given their historical stewardship of and continued reliance upon the land.  
[449] Constitutional decisions to date lead to the conclusion that both Parliament and the  
provinces have authority to pass laws with respect to the environment, including with respect to  
the impact upon the environment of physical activities and designated projects in the resource  
sector, each with respect to the aspect of the environment within their own constitutional authority.  
My point here is a simple one: the trust of citizens in their various levels of government to protect  
their environmental interests rests with all levels of government given the complexity and  
pervasiveness of environmental concerns, appropriately named the existential threat of our times.  
[450] The challenge posed by protecting the environment is no longer the purview only of the  
young and idealistic; it has engaged governments and civil society, the science community, and  
increasingly, leaders of industry and commerce across the globe. It falls to governments, as  
guardians of the environment, to put in place legislative processes and administrative infrastructure  
to protect against environmental effects. It falls to the courts, in turn, to determine whether  
governments have the constitutional authority to enact the environmental protection regimes they  
have chosen for this purpose. Courts must do so neutrally and dispassionately. But such a stance  
need not be in service of the kind of rigidity that hobbles the ability of governments to respond to  
the complexities of modern Canadian society. To that end, courts in this country have developed  
various interpretive tools and metaphors designed to ensure some degree of flexibility in our  
federal system of governance. Now is not the time to abandon these tools or, worse yet, to give  
credence to the kind of “Trojan horse” metaphor advanced by Alberta and Saskatchewan that, in  
likening Canada to a foreign invading army deceptively breaching our protective walls, only fuels  
suspicion and pits one level of government against another.  
[451] Canadian constitutional law is already replete with metaphors, including many involving  
something central to the environment itself: water. The division of powers as “water-tight  
compartments” (Canada (AG) v Ontario (AG), [1937] 1 DLR 673 at 684, [1937] AC 326); the  
Constitution as a “living tree” capable of growth, nourished by progressive interpretation  
(Edwards v Canada (Attorney General), [1930] 1 DLR 98 at 106-107, [1930] AC 124); flexible  
federalism as a “dominant tide” that cannot sweep designated powers “out to sea” (Reference re  
Securities Act, 2011 SCC 66 at para 62 [Securities Reference]). To these metaphors I add only this.  
We in this country are all in the same boat. The division of powers provides multiple oars and in  
many instances no assurance that we will all row in the same direction. But constitutional  
interpretation can and should at least allow for such cooperation, where feasible. The environment  
is one such case. Our planet is on fire, and we need water not heat. The majority offers heat. This  
is water. It offers at least the opportunity for governments in this country to work collaboratively  
Page: 136  
on issues of overlapping jurisdiction in order that they may better serve the multifaceted concerns  
of their citizens. Without such water, we risk more than merely rowing in different directions: we  
risk running aground.  
II.  
History of Canadian Environmental Assessment Legislation  
[452] The Parliament of Canada has been legislating to protect the environment for almost four  
decades, including with federal environmental assessment legislation in relation to subjects within  
federal jurisdiction. When the predecessors to the IAA are compared to subsequent iterations, it is  
apparent that the approach to environmental assessment has incrementally evolved, but the  
fundamental purpose remains the same: generally, it is to protect against adverse effects. Each of  
the modalities employed since 1984 has included these essential elements: an environmental  
assessment process; regulation of environmental “effects” described as within federal jurisdiction;  
“environmental effects” broadly defined as inclusive of changes to the physical environment, to  
health and socio-economic conditions, to physical and cultural heritage, as well as to the use of  
land and resources for traditional purposes by Indigenous people, and cooperation amongst  
jurisdictions. The project-based approach a listing of projects to which the legislation would  
apply is common to the last two iterations of environmental legislation, and as discussed herein,  
has already passed constitutional muster.  
A.  
EARPGO or the Guidelines Order  
[453] In 1984, pursuant to the Department of the Environment Act, being Part I of the  
Government Organization Act, 1970, RSC 1970, c 14 (2nd Supp), as amended by Part III of the  
Government Organization Act, 1979, SC 1978-1979, c 13 as it appeared on June 22, 1984, the  
Governor in Council promulgated the Environmental Assessment and Review Process Guidelines  
Order, SOR/84-467: [EARPGO or Guidelines Order]. EARPGO required all federal departments  
and agencies with decision-making authority for any proposal to undertake environmental  
screening and initial assessment to determine “whether, and the extent to which, there may be any  
potentially adverse environmental effects from the proposal”: s 10(1). A proposal meant “any  
initiative, undertaking or activity for which the Government of Canada has a decision making  
responsibility”: s 2. The Guidelines Order applied to any proposal that (s 6):  
(a) was undertaken by a federal department,  
(b) may have had an environmental effect on an area of federal jurisdiction,  
(c) required federal funding, or  
(d) was located on federal lands.  
[454] In considering a proposal, the initiating department was required to consider potential  
environmental effects, social effects, public concerns, and could also consider general  
socioeconomic effects: s 4. Federal decision-makers could reject proposals within their governing  
legislation: s 12(f).  
Page: 137  
[455] The responsible federal department decided a project proposal could proceed if it had no  
adverse effects, insignificant adverse effects, or mitigable adverse effects. A proposal was to be  
modified, rescreened, or abandoned if it had unacceptable effects. If the proposal had significant  
adverse effects or unknown adverse effects, it was to undergo further review: s 12.  
[456] EARPGO contemplated cooperation with provincial assessments: ss 5, 8, 35(c).  
[457] The EARPGO environmental assessment regime was in place when the Supreme Court of  
Canada decided the Oldman River case.  
B.  
Canadian Environmental Assessment Act, 1992  
[458] In 1992, Parliament passed the Canadian Environmental Assessment Act, SC 1992, c 37  
[CEAA, 1992]. CEAA, 1992 had a broader scoping mechanism than EARPGO. It required an  
environmental assessment of a project before a federal authority exercised certain powers or  
performed certain duties or functions, including if it (s 5):  
(a) was the proponent of a project,  
(b) provided financial assistance to a project,  
(c) administered federal lands connected to the project, or  
(d) issued a permit or authorization for a project from a list as prescribed by regulation.  
[459] However, the legislation also allowed the Minister of the Environment to refer a project  
for an environmental assessment in various instances notwithstanding that no power, duty or  
function referred to in s 5 was to be exercised or performed by a federal authority. One involved  
where the Minister was “of the opinion that the project may cause significant adverse  
environmental effects in another province”: s 46(1) [emphasis added]. Another was where the  
Minister was “of the opinion that the project may cause significant adverse environmental effects  
occurring ... outside Canada and outside ... federal lands”: s 47(1) [emphasis added]. A third  
involved where the Minister was of the opinion that the project may cause significant adverse  
environmental effects on certain enumerated federal lands: s 48(1).  
[460] CEAA, 1992 provided for a review of projects unless specifically excluded: ss 7(1)(a),  
59(c)-(c.1). It required environmental assessment to be conducted as early as practicable in the  
planning stages: s 11. An “environmental effect” included any change the project may cause to the  
environment of listed wildlife species and habitats, any effect of such change on health and socio-  
economic conditions, physical and cultural heritage, use of lands and resources by Indigenous  
persons, and on structures and sites of historical, archeological, paleontological, or architectural  
significance: s 2(1).  
[461] The environmental assessment process (s 14) required consideration of a wide variety of  
factors including environmental effects, their significance, public comments, mitigation measures,  
Page: 138  
and alternative means of carrying out the project; and could consider community knowledge and  
Aboriginal traditional knowledge: ss 16, 16.1.  
[462] The responsible authority could approve a project if it was not likely to cause significant  
adverse environmental effects, or if the significant adverse environmental effects could be justified  
in the circumstances: ss 20, 23(1), 37(1).  
[463] CEAA, 1992 contemplated cooperation with other jurisdictions (ss 12(4)), a joint review  
panel (s 40), delegation (s 17), or coordination (ss 12.1-12.5), including with provincial agencies,  
bodies established under land claim agreements, and foreign states.  
[464] The CEAA, 1992 environmental assessment regime was in place when the Supreme Court  
of Canada decided the Moses and MiningWatch cases.  
C.  
Canadian Environmental Assessment Act, 2012  
[465] In 2012, Parliament passed the Canadian Environmental Assessment Act, 2012, SC 2012,  
c 19, s 52 [CEAA, 2012], the forerunner to the IAA. CEAA, 2012 applied to designated projects,  
much like the IAA. “Designated projects” were defined to include physical activities (a) carried  
out in Canada or on federal lands; (b) designated by regulations or ministerial order and (c) linked  
to the same federal authority as specified in those regulations or that order: ss 2(1), 10, 14(2), 84(a).  
The Regulations Designating Physical Activities, SOR/2012-147 [the 2012 Regulation] set out the  
“Project List.”  
[466] CEAA, 2012 added an effects-based trigger: it prohibited proponents from carrying out the  
designated project if that act may cause an “environmental effect” within the legislative authority  
of Parliament unless the Agency decided no environmental assessment was required or the  
proponent complied with the conditions set out in a decision statement: ss 5(1), 6.  
[467] Section 5 of CEAA, 2012 identified “environmentaleffects essentially identically to the  
effectsnow set out in ss 7(1)(a) to (d) of the IAA: a change to various components of the  
environment within federal jurisdiction: fish and fish habitat, aquatic species, migratory birds; and  
other components set out in Schedule 2. In turn, these components were defined in federal  
legislation. Environmental effects also included changes that may be caused to the environment  
on federal lands, in another province, or outside Canada. Finally, environment effects included any  
change to the environment that may affect the health and socio-economic conditions of Aboriginal  
peoples, their heritage, the use of lands and resources for traditional purposes and any structure or  
site of historical, archaeological, paleontological, or architectural significance. Certain other  
effects were to be taken into account if the designated project required a federal authority to  
exercise a power or duty under federal legislation apart from the CEAA, 2012: ss 5(2), 7.  
[468] The environmental assessment process was required to consider a wide variety of factors,  
including environmental effects, their significance, public comments, mitigation measures, and  
Page: 139  
alternative means of carrying out the project; and could consider community knowledge and  
Indigenous traditional knowledge: s 19.  
[469] The decision-maker (typically the Minister, the National Energy Board or Canadian  
Nuclear Safety Commission) decided whether the project was likely to cause significant adverse  
environmental effects: s 52(1). If so, the decision was referred to the Governor in Council who  
decided whether the effects were justified in the circumstances: s 52(4).  
[470] CEAA, 2012 provided for jurisdictional cooperation and a joint review panel: ss 18, 40.  
D.  
IAA and Regulation  
[471] In 2019, Parliament replaced CEAA, 2012 with the IAA. The Governor in Council, on the  
recommendation of the Minister, promulgated the accompanying Regulation.  
[472] Of particular relevance to this Reference is a comparison between the Project Lists created  
under CEAA, 2012 and under the IAA. Later, at paras 517-523, I explain the main differences.  
[473] While this legislative history does not answer the constitutional question before us, it is  
useful context and helps dispel the notion that the incremental progression of environmental  
measures to include effects from an emerging form of resource recovery, in situ oil sands projects,  
is a colourable effort to control or veto development and management of provincial natural  
resources. The additions to the Project List can be seen as incremental responses to changes in the  
energy industry, particularly the addition of wind turbines and in situ oil extraction facilities, the  
latter being expected to dominate future oil recovery processes.209  
III.  
The Legislative Scheme of the IAA and Regulation  
A. The IAA: Title, Preamble, Purpose, and Impact Assessment Regime  
1. The Title, Preamble and Stated Purpose  
[474] The title of the IAA is “An Act respecting a federal process for impact assessments and the  
prevention of significant adverse environmental effects”.  
[475] The Preamble proclaims Canada’s commitment to “fostering sustainability”. The means  
chosen to achieve that goal is the “impact assessment” process, described as an “effective means  
of integrating scientific information and Indigenous knowledge into decision-making processes”  
in respect of “designated projects”. Other expressed values in the Preamble include public  
participation; respect for the Indigenous peoples of Canada; cooperation among jurisdictions;  
transparent, timely decisions contributing to a positive investment climate; impact assessment  
contributing to Canada’s ability to meet environmental and climate change commitments;  
209 See Exhibit “B” to the Affidavit of Paul Tsounis, sworn December 12, 2019, Alberta Record at C14-15.  
Page: 140  
innovation and technologies to reduce adverse changes to the environment and to health, social or  
economic conditions; and the importance of regional assessments in assessing the effects of  
activities and federal policies, plans and programs.  
[476] The Purposes of the IAA, itemized in s 6, contain the stated legislative intentions, including  
to: foster sustainability; protect the environment and the health, social and economic conditions  
within Parliament’s legislative authority from adverse effects caused by a designated project; and  
establish an impact assessment regime that takes into account both positive and adverse effects  
that may be caused by designated projects. The purposes are fully considered as a matter of  
intrinsic evidence showing the legislative purpose at paras 570-571 of this Opinion.  
2.  
The Impact Assessment Regime  
[477] The Impact Assessment Agency (the Agency) is created by s 153(1). Among the Agency’s  
many objects is the conduct of impact assessments: ss 155-156.  
[478] The impact assessment process involves four stages: planning, preparation of the impact  
statement, conduct of the impact assessment, and decision-making, followed by implementation.  
[479] The environment means the components of the Earth, and includes (a) land, water and air,  
including all layers of the atmosphere; (b) all organic and inorganic matter and living organisms;  
and (c) the interacting natural systems that include components … in paragraphs (a) and (b)”: s 2.  
[480] In the IAA, jurisdictionincludes a variety of entities: a federal authority, agency, or body;  
a provincial government, agency or body; an Indigenous governing body; a foreign government;  
or an international organization of states: s 2. This term is important because of the scope in the  
IAA for cooperation between various “jurisdictions” with authority over environmental effects.  
a.  
Section 7 and the Regulation’s Project List  
[481] Section 7 of the IAA and the Regulation operate together as the trigger of the federal  
environmental impact assessment regime.  
[482] Section 7 applies to “designated projects”. Under s 109(b), the Governor in Council is  
empowered to pass regulations “designating a physical activity or class of physical activities”.  
Section 2 of the IAA defines “designated projects” as physical activities that are (a) carried out in  
Canada or on federal lands; and (b) are designated by regulations under s 109(b) or by Ministerial  
order under s 9(1). Accordingly, it passed the Regulation that sets out the Project List.  
[483] In the result, s 7 is triggered or engaged if the proposed “physical activity” or “designated  
project” is on the Project List or designated by Ministerial order.  
Page: 141  
[484] A thumbnail sketch of s 7 of the IAA illustrates its intended jurisdictional reach. By the  
terms of s 7(1), a proponent of a designated activity is prohibited from doing anything that may  
cause certain effects: (a) a change to certain components of the environment within the legislative  
authority of Parliament, including fish and fish habitat, aquatic species, migratory birds; (b) any  
change to the environment on federal lands, in another province, or outside Canada; (c) any change  
to the environment of Indigenous peoples with impact on physical and cultural heritage, use of  
lands for traditional purposes, or structures of significance; (d) any change to health, social or  
economic conditions of Indigenous peoples; or (e) any change to a health, social or economic  
matter within the legislative authority of Parliament set out in Schedule 3 (as yet undefined).  
[485] In the IAA, for s 7, and in this Opinion, effectsmeans, “unless the context requires  
otherwise, changes to the environment, or to health, social or economic conditions and the positive  
and negative consequences of these changes”: s 2.  
[486] The IAA environmental assessment regime regulates environmental effects that may be  
caused by designated projects on the Project List in these categories listed in the Schedule of the  
Regulation:  
National Parks and Protected Areas (ss 1-11);  
Defence (ss 12-17);  
Mines and Metal Mills (ss 18-25);  
Nuclear Facilities (ss 26-29);  
Oil, Gas and Other Fossil Fuels (ss 30-38);  
Electrical Transmission Lines and Pipelines (ss 39-41);  
Renewable Energy (ss 42-45);  
Transport (ss 46-55);  
Hazardous Waste (ss 56-57); and  
Water Projects (ss 58-61).  
[487] The Project List contains many matters that are incontrovertibly within federal  
constitutional authority and some that are constitutionally contested: certain mines and metal mills;  
certain oil, gas and other fossil fuel projects; certain renewable energy projects; new public  
highways longer than 75 kilometers; and railways and railway yards of a certain size.  
[488] In addition to these designations on the Project List, the Minister has the power to designate  
a physical activity that may cause adverse effects within federal jurisdiction, or adverse direct or  
incidental effects, or if public concerns related to those effects warrant the designation; before  
doing so, the Minister may consider adverse impacts on the rights of Indigenous peoples under s  
35 of the Constitution Act, 1982 as well as other relevant assessments: ss 9(1)-(2).  
[489] In the IAA, and in this Opinion, direct or incidental effects” means “effects that are directly  
linked or necessarily incidental to a federal authority’s exercise of a power or performance of a  
duty or function that would permit the carrying outof a physical activity or designated project,  
Page: 142  
or to a federal authority’s provision of financial assistance…for the purpose of enabling that  
activity or project to be carried out…”: s 2.  
[490] Therefore, s 7, working in conjunction with the Project List, is ground zero of the  
environmental impact assessment process: the s 7 process is triggered once a physical activity  
becomes a “designated project. The proponent of such a project must follow the impact  
assessment process to lawfully undertake the designated activity or project: ss 10-20.  
[491] The proponent of a designated project may undertake activity that may cause the effects set  
out in s 7(1) in any of the following circumstances: the Agency decides no impact assessment is  
required (s 7(3)(a)); the proponent complies with conditions in a decision statement (s 7(3)(b)); or  
it is permitted by the Agency for assessment purposes (s 7(3)(c)). Moreover, effects in s 7(1)(d)  
may be undertaken if the change is not adverse and an agreement is reached with an Indigenous  
governing body (s 7(4)).  
[492] Similar considerations apply with respect to federal authorities being prohibited from  
exercising any power or performing any duty or function that allows a designated project to be  
carried out under s 8. Such a prohibition ceased with respect to a designated project in either of  
the following circumstances: the Agency decides that (a) no impact assessment is necessary, or (b)  
an assessment takes place, and the relevant effects are found to be in the public interest.  
b.  
Phase I. The Planning Phase  
i.  
Proponent and Agency steps to determine if an impact  
assessment is necessary: ss 10-15  
[493] The proponent of a designated activity must participate in the Planning Phase. The  
proponent provides a project description: s 10. The Agency must provide for public participation  
regarding a possible impact assessment (s 11) and offer to consult with any jurisdiction or  
Indigenous group that may be affected: s 12. Federal authorities must co-operate with provision of  
information: s 13. The Agency must provide a summary of issues to the proponent (s 14), and the  
proponent must provide the Agency with a notice setting out how it intends to address the issues  
and a detailed description of the designated project: s 15.  
ii.  
The Agency’s decision as to whether an impact  
assessment is necessary: s 16  
[494] In deciding whether an impact assessment is necessary, the Agency considers the filed  
information, including these factors: the possibility that the designated project “may cause adverse  
effects within federal jurisdiction or adverse or incidental effects[emphasis added]; any adverse  
impact on Indigenous peoples; and comments from the public, a jurisdiction or Indigenous group:  
s 16(2).  
Page: 143  
[495] If the Agency decides an impact assessment is necessary (and the Minister does not  
approve the substitution of a process under s 31, i.e. of another jurisdiction) the Agency must  
provide the proponent with notice of the commencement of the impact assessment, setting out the  
information required, including guidelines for studies, plans for cooperation with other  
jurisdictions, engagement with Indigenous peoples, public participation, and issuance of permits,  
after considering factors set out in s 22: s 18.  
[496] The list of s 22 factors is extensive, and includes changes to the “environment or to health,  
social or economic conditions” likely to be caused by carrying out the designated project, including  
the effects of accidents or malfunctions, cumulative effects caused by the designated project in  
combination with other physical activities, mitigation measures, impact on an Indigenous peoples  
or their rights, and many more, including “any other matter relevant to the impact assessment that  
the Agency requires to be taken into account”.  
c.  
Phase II. The Impact Statement  
[497] The proponent must provide the Agency with an impact statement, including the  
information required in the notice: s 19. If the proponent fails to do so, the impact assessment is  
terminated: s 20.  
[498] The Agency (or the Minister if the impact assessment is referred to a review panel) must  
offer to consult and cooperate with any jurisdiction with authority to assess environmental impacts  
of a designated project, including those set out in s 2 of the IAA: s 21.  
d.  
Phase III. The Impact Assessment  
[499] Whether the Agency or a Review Panel or a substituted process conducts the impact  
assessment, it must consider the factors listed in s 22: ss 33, 42.  
[500] The Agency must conduct the impact assessment of the designated project and prepare a  
report: ss 25-29. It may use any information available or require further information or study: s 26.  
It must ensure the opportunity for meaningful public participation: ss 27-28. The final impact  
assessment report must be submitted to the Minister within the 300-day time limit: s 28(2).  
i.  
The impact assessment report considers adverse effects  
and adverse or incidental effects of a designated project  
[501] The Agency’s report must describe the effects that are likely to be caused by carrying out  
the designated project, and moreover, identify those which are adverse effects within federal  
jurisdiction and adverse direct or incidental effects, specifying the extent to which those effects  
are significant: s 28(3).  
Page: 144  
[502] The Agency’s report must also explain how it used Indigenous knowledge (s 28(3.1));  
summarize the public comments; recommend mitigation measures and follow-up programs; and  
provide its rationale and conclusions: s 28(3.2).  
ii.  
Substitution and delegation of impact assessment  
[503] The Agency may delegate the impact assessment or part of it, or preparation of the report,  
to a “jurisdiction” as defined in s 2: s 29.  
[504] Upon the request of a jurisdictiondescribed in ss 2(c) to (g), (e.g., provincial government  
or an Indigenous body), the Minister may approve the substitution of its impact assessment process  
if satisfied the process will include consideration of the s 22(1) factors: s 31(1).  
[505] The Minister must be satisfied that the report will set out adverse effects within federal  
jurisdiction, adverse and incidental effects, and the significance of those effects, and that it  
considered Indigenous knowledge: ss 33(2)-(2.1).  
[506] If the Minister approves a substituted process, the resulting assessment is an impact  
assessment in conformity with the IAA, but the Agency may require more information for the  
purposes of decision-making under s 60(1): s 34.  
iii.  
Impact assessment by a review panel  
[507] If it is in the public interest, the Minister may refer an impact assessment to a review panel:  
s 36. To decide whether it is in the public interest, the Minister must consider: the extent to which  
the effects are adverse; public concerns; opportunities for cooperation with any jurisdictionthat  
has powers, duties, or functions in relation to assessment of the project; and any adverse impact  
on the rights of Indigenous peoples under the Constitution Act, 1982: s 36(2). The review panel  
will conduct an impact assessment, facilitate public participation, and prepare a report: s 51.  
[508] The Minister may also establish a joint review panel with another jurisdiction(such as a  
province or Indigenous body) with powers to conduct an environmental assessment: s 39.  
e.  
Phase IV. The Decision  
i. Minister’s decision  
[509] After the impact assessment report is complete under the Agency process (s 28(2)) or the  
substituted process (s 31) the Minister decides the following question under s 60(1)(a):  
whether the adverse effects within federal jurisdiction and the adverse direct or  
incidental effects that are indicated in the report are, in light of the factors  
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in section 63 and the extent to which those effects are significant, in the public  
interest. [emphasis added]  
The phrase “effects within federal jurisdiction” is defined in s 2 of the IAA and mirrors the effects  
listed in s 7(1). Accordingly, the public interest determination is focused on the adverse s 7 effects  
caused by the designated project.  
ii.  
Referral to Governor in Council  
[510] Alternatively, the Minister may refer that decision to the Governor in Council: s 60(1)(b).  
Moreover, the Minister, in consultation with any responsible Minister, must refer the decision to  
Governor in Council where the report is from a review panel (s 55) or where the assessment by the  
review panel is terminated (s 59): s 61.  
iii.  
The Governor in Council’s Decision  
[511] The Governor in Council, too, must decide “whether the adverse effects within federal  
jurisdiction and the adverse direct or incidental effects that are indicated in the report are, in  
light of the factors referred to in section 63 and the extent to which those effects are significant, in  
the public interest”: s 62 [emphasis added]. Again, the focus is on whether adverse s 7 effects  
caused by the designated project are in the public interest.  
iv.  
The Decision must consider the s 63 Factors  
[512] Both the Minister and the Governor in Council must make their public interest  
determination in light of the impact assessment report and the following factors outlined in s 63:  
(a) the extent to which the designated project contributes to sustainability;  
(b) the extent to which the adverse effects within federal jurisdiction and the  
adverse direct or incidental effects in the impact assessment report are significant;  
(c) the implementation of mitigation measures that the Minister or the Governor in  
Council considers appropriate;  
(d) the impact of the designated project on Indigenous groups and on Indigenous  
peoples as recognized and affirmed by s 35 of the Constitution Act, 1982; and  
(e) the extent to which the effects of the designated project hinder or contribute to  
Canada’s ability to meet its environmental obligations and commitments in respect  
of climate change.  
The s 22 factors are considered in preparation of the impact assessment report, and the report is  
considered in the ultimate decision that must consider the s 63 factors.  
Page: 146  
[513] If the Minister or Governor in Council determines that the effects are in the public interest,  
the Minister must establish any appropriate conditions, also definitionally linked to federal  
jurisdiction: s 64. The proponent must comply. Conditions must include mitigation measures and  
a follow-up program and may include an adaptive management plan: ss 64(1)-(4).  
[514] The Minister must issue and make public a decision statementwith detailed reasons for  
the determination made under s 60 or 62, conditions, and a timeline: ss 65, 66. Decision statements  
are part of the licensing processes under the Nuclear Safety and Control Act, Canadian Energy  
Regulator, and Canada Oil and Gas Operations Act: s 67.  
v.  
Projects by federal authorities  
[515] There is an assessment process under the IAA for non-designated projects on federal lands  
and international projects proposed by Canada or receiving federal financial assistance: ss 81-91.  
There are exemptions for projects that will cause insignificant environmental effects (s 88(1)); or  
projects related to national security under the Emergencies Act; or that must be carried out urgently  
to protect the environment: s 91.  
[516] The IAA provides for regional assessments where the region is entirely on federal lands; or  
in part on or outside federal lands, by agreement: ss 92, 93.  
B.  
What Has Changed: Comparing CEAA, 2012 vs IAA Project Lists  
[517] A comparison between the 2012 Regulation Project List and the IAA Regulation Project  
List shows changes in four categories: (1) projects where the threshold for application of the  
federal environmental assessment regime is raised that is, there must be more activity or  
production for the IAA to apply than was the case under the CEAA, 2012; (2) projects where the  
threshold for application of the federal regime remains the same; (3) projects where the federal  
regime applies for the first time; and (4) projects that are no longer on the Project List.  
[518] First, for some projects, the threshold for application of the federal impact assessment  
regime is raised moving from the CEAA, 2012 Regulation Project List to the IAA Project List. For  
example, for a pipeline project, the threshold length of pipeline is raised from 40 km or more (2012  
Regulation Schedule, ss 46, 47) to 75 km or more (Regulation Schedule, s 41). For a metal mine  
project, other than rare earth element mine project, the threshold ore production capacity is raised  
from 3000 t/day or more (2012 Regulation Schedule, ss 16(a), 17 (a)) to 5000 t/day (Regulation  
Schedule, ss 18(c), 19(c)). For a coal mine project, the threshold coal production capacity is raised  
from 3000 t/day or more (2012 Regulation Schedule, ss 16(d), 17(d)) to 5000 t/day or more  
(Regulation Schedule, ss 18(a), 19(a)). For a new all-season public highway that requires a new  
right of way, the threshold is extended from 50 km (2012 Regulation Schedule, s 25(c)) to 75 km  
(Regulation Schedule, s 51).  
Page: 147  
[519] Second, for some projects, the threshold for application of the federal impact assessment  
regime remains the same in the CEAA, 2012 Project List and the IAA Project List. Examples are  
oil sands mine projects, oil refinery projects, facilities to produce liquid petroleum projects, and  
petroleum storage facilities.  
[520] Third, the federal environmental assessment regime applies to some projects designated  
for the first time in the IAA Project List, as described in the Regulatory Impact Analysis Statement  
(RIAS)210 accompanying the Regulation. In this category are four types of designated projects.  
New under this regime, and apparently the provocateur for this Reference, are in situ oil sands  
extraction facilities with a threshold for application of the federal assessment regime being a  
bitumen production capacity of 2000 m3/day or more: Regulation Schedule, ss 32, 33. Also added  
are other project types that are presumably not controversial: offshore wind turbines (ss 44, 45);  
new permanent causeways over 400 m long through navigable waters (s 50); and new entries for  
federal protected areas including certain activities in national parks, wildlife areas and migratory  
bird sanctuaries (s 1).  
[521] Fourth, several project types were removed from the Project List, because “it was  
determined that they did not meet the threshold of projects with the greatest potential for effects  
in federal jurisdiction related to the environment”: RIAS at 5668. The removed projects include,  
for example, decommissioning and abandonment of existing pipelines (regulated by the Canadian  
Energy Regulator), certain mines that generally have lower effects than others, and certain projects  
regulated by the Canadian Nuclear Safety Commission.  
[522] This profile is consistent with Parliament’s objective for the Project List, as set out in the  
RIAS at 5661: “to identify those major projects with the greatest potential for adverse effects on  
areas of federal jurisdiction related to the environment, so that they can enter into the impact  
assessment process” [emphasis added]. The RIAS further notes that the Project List uses a “criteria-  
based approach”, with the list under CEAA, 2012 as a starting point, and that the changes to the  
Project List “are not expected to significantly change the total number of projects that are subject  
to federal impact assessment annually compared to the number under the CEAA, 2012” and that  
[t]he Agency’s analysis suggests there would likely be a small decrease in the number of projects  
that may be required to undergo federal impact assessment on an annual basis”: RIAS at 5661.  
[523] In my opinion, this review shows that not much has changed between CEAA, 2012 and the  
IAA Project List. A federal project-based environmental assessment regime has existed for ten  
years, with designated projects on a Project List, that may cause adverse effects said to be in federal  
jurisdiction. No proponents of projects affected by this legislation have challenged its  
constitutionality or other aspects of its application. Alberta now does so, because effects said to be  
in federal jurisdiction that may be caused by in situ oil sands projects are added to the Project List,  
an inevitable progression from an environmental protection point of view since in situ projects are  
the way of the future in the oil sands. As noted, according to evidence filed by Alberta from Paul  
210 Regulatory Impact Analysis Statement, (2019) C Gaz II, Vol 153, No 17, 5661 at 5664-5665 (published following  
Physical Activities Regulations, SOR/2019-285).  
Page: 148  
Tsounis, an employee with the Alberta Department of Energy, in terms of future development  
based on oil reserves, mining is projected to make up 19% and in situ production 81%.211  
IV.  
Distribution of Legislative Powers Under the Constitution Act, 1867  
[524] For ease of reference, I include the relevant portions of ss 91, 92, 92A and 132 of the  
Constitution Act, 1867.  
POWERS OF THE PARLIAMENT  
Legislative Authority of Parliament of Canada  
91. It shall be lawful for the Queen, by and with the Advice and Consent of the  
Senate and House of Commons, to make Laws for the Peace, Order, and good  
Government of Canada, in relation to all Matters not coming within the Classes of  
Subjects by this Act assigned exclusively to the Legislatures of the Provinces; and  
for greater Certainty, but not so as to restrict the Generality of the foregoing Terms  
of this Section, it is hereby declared that (notwithstanding anything in this Act) the  
exclusive Legislative Authority of the Parliament of Canada extends to all Matters  
coming within the Classes of Subjects next hereinafter enumerated; that is to say,  
[emphasis added].  
12. Sea Coast and Inland Fisheries.  
24. Indians, and Lands reserved for the Indians.  
29. Such Classes of Subjects as are expressly excepted in the Enumeration of the  
Classes of Subjects by this Act assigned exclusively to the Legislatures of the  
Provinces.  
And any Matter coming within any of the Classes of Subjects enumerated in this  
Section shall not be deemed to come within the Class of Matters of a local or private  
Nature comprised in the Enumeration of the Classes of Subjects by this Act  
assigned exclusively to the Legislatures of the Provinces.  
211  
Natural Resources Canada, “Crude oil facts”, December 10, 2019 (Exhibit “B” to the Affidavit of Paul Tsounis,  
sworn December 12, 2019, Record at C14-15).  
Page: 149  
Treaty Obligations  
132. The Parliament and Government of Canada shall have all Powers necessary or  
proper for performing the Obligations of Canada or of any Province thereof, as Part  
of the British Empire, towards Foreign Countries, arising under Treaties between  
the Empire and such Foreign Countries.  
EXCLUSIVE POWERS OF PROVINCIAL LEGISLATURES  
Subjects of exclusive Provincial Legislation  
92. In each Province the Legislature may exclusively make Laws in relation to  
Matters coming within the Classes of Subjects next hereinafter enumerated; that is  
to say, [emphasis added]  
10. Local Works and Undertakings other than such as are of the following Classes:  
(a) Lines of Steam or other Ships, Railways, Canals, Telegraphs, and other Works  
and Undertakings connecting the Province with any other or others of the  
Provinces, or extending beyond the Limits of the Province:  
(b) Lines of Steam Ships between the Province and any British or Foreign Country:  
(c) Such Works as, although wholly situate within the Province, are before or after  
their Execution declared by the Parliament of Canada to be for the general  
Advantage of Canada or for the Advantage of Two or more of the Provinces.  
13. Property and Civil Rights in the Province.  
16. Generally all Matters of a merely local or private Nature in the Province.  
NON-RENEWABLE NATURAL RESOURCES, FORESTRY RESOURCES  
AND ELECTRICAL ENERGY  
Laws respecting non-renewable natural resources, forestry resources and  
electrical energy  
92A. (1) In each province, the legislature may exclusively make laws in relation to  
Page: 150  
exploration for non-renewable natural resources in the province;  
(a)  
(b)  
development, conservation and management of non-renewable  
natural resources and forestry resources in the province, including  
laws in relation to the rate of primary production therefrom; and  
(c)  
development, conservation and management of sites and facilities in  
the province for the generation and production of electrical energy.  
Export from provinces of resources  
(2) In each province, the legislature may make laws in relation to the export from  
the province to another part of Canada of the primary production from non-  
renewable natural resources and forestry resources in the province and the  
production from facilities in the province for the generation of electrical energy,  
but such laws may not authorize or provide for discrimination in prices or in  
supplies exported to another part of Canada.  
Authority of Parliament  
(3) Nothing in subsection (2) derogates from the authority of Parliament to enact  
laws in relation to the matters referred to in that subsection and, where such a law  
of Parliament and a law of a province conflict, the law of Parliament prevails to the  
extent of the conflict.  
“Primary Production”  
(5) The expression "primary production" has the meaning assigned by the Sixth  
Schedule.  
V.  
Analysis  
A.  
General Principles  
1. The Architectural Design of the Constitution Act, 1867: Federalism  
[525] The Constitution Act, 1867 establishes a governance system of federalism, “regional  
diversity within a single nation”: R v Comeau, 2018 SCC 15 at para 85. Canadian federalism  
envisages a delicately balanced power sharing arrangement as the bedrock of democracy,  
recognizing the diversity of the component parts of the Confederation and the autonomy of  
provincial governments to develop their societies within their respective spheres of jurisdiction.  
The federal structure of our country also facilities democratic participation by distributing power  
to the government “thought to be most suited to achieving the particular societal objective having  
Page: 151  
regard to this diversity”: Reference Re Secession of Quebec, [1998] 2 SCR 217 at para 58, 161  
DLR (4th) 385.  
[526] In References re Greenhouse Gas Pollution Pricing Act, 2021 SCC 11 [GGPPA SCC],  
Wagner CJC said this on federalism at paras 49-50:  
Sections 91 and 92 of the Constitution give expression to the principle of  
federalism and divide legislative powers between Parliament and the provincial  
legislatures: Reference re Securities Act, 2011 SCC 66, [2011] 3 S.C.R. 837 (“2011  
Securities Reference”), at para. 54. Under the division of powers, broad powers  
were conferred on the provinces to ensure diversity, while at the same time  
reserving to the federal government powers better exercised in relation to the  
country as a whole to provide for Canada’s unity: Canadian Western Bank, at  
para. 22. Importantly, the principle of federalism is based on a recognition that  
within their spheres of jurisdiction, provinces have autonomy to develop their  
societies, such as through the exercise of the significant provincial power in relation  
to “Property and Civil Rights” under s. 92(13). …  
Although early Canadian constitutional decisions by the Judicial Committee of the  
Privy Council applied a rigid division of federal-provincial powers as watertight  
compartments, this Court has favoured a flexible view of federalism what is best  
described as a modern form of cooperative federalism that accommodates and  
encourages intergovernmental cooperation: 2011 Securities Reference, paras. 56-  
58. That being said, the Court has always maintained that flexibility and  
cooperation, while important to federalism, cannot override or modify the  
constitutional division of powers. As the Court remarked in 2011 Securities  
Reference, “[t]he ‘dominant tide’ of flexible federalism, however strong its pull  
may be, cannot sweep designated powers out to sea, nor erode the constitutional  
balance inherent in the Canadian federal state”: para. 62. It is in light of this  
conception of federalism that I approach this case.  
2.  
The Subject of the Environment: A “Matter” that Falls within both  
Federal and Provincial Heads of Constitutional Authority  
[527] Section 91 of the Constitution Act, 1867 states that it shall be lawful for Parliament to make  
laws for the Peace, Order, and good Government” (POGG) of Canada in relation to all Matters  
not coming within the exclusive jurisdiction of the provinces, and that the “exclusive Legislative  
Authority of the Parliament of Canada extends to all Matters” enumerated, including matters such  
as “Sea Coast and Inland Fisheries”, and “Indians, and Lands reserved for the Indians”.  
[528] Section 92 of the Constitution Act, 1867 states that in each Province the Legislature may  
exclusively make Laws in relation to Matters coming within the Classes of Subjects next  
hereinafter enumerated”, including “Local Works and Undertakings” and “Property and Civil  
Rights in the Province”. Section 92A(1) assigns exclusive jurisdiction to the provinces over non-  
Page: 152  
renewable natural resources”: the legislature may exclusively make laws in relation to (a)  
exploration for non-renewable natural resources in the province” and “(b) development,  
conservation and management of non-renewable natural resources and forestry resources in the  
province, including laws in relation to the rate of primary production therefrom”.  
[529] Canada and the provinces have enacted environmental assessment legislation to assess the  
environmental impact of activities and projects. As early as 1992, in the Oldman River decision,  
the Supreme Court of Canada endorsed the authority of both Parliament and the provincial  
legislatures to enact environmental protection legislation directed at adverse impacts on the  
environment.  
[530] Oldman River concerned the construction of a dam in southern Alberta. After study,  
planning, and environmental assessment under provincial legislation, Alberta authorized the  
construction of the dam. Though a provincial assessment had been done, because the project  
affected navigable waters, fisheries, and “Indians and Indian lands, federal interests were  
engaged, and the dam proposal was reviewed by the Regional Screening and Co-Ordinating  
Committee of the federal Department of the Environment. The building of the dam was well  
underway when the Friends of the Oldman River Society brought an application for judicial review  
to compel a public environmental assessment pursuant to the Guidelines Order. The Society  
argued that the Minister of Transport must approve the project under the Navigable Waters  
Protection Act, RSC 1985, c N-22, and in so doing was required to provide an assessment under  
the Guidelines Order; and that the Minister of the Environment had a similar duty under the  
Fisheries Act, RSC, 1985, c F-14: Oldman River at 22. The constitutional question was whether  
the Guidelines Order was so broad as to offend ss 92 and 92A of the Constitution Act, 1867: Ibid  
at 31, 62. The Supreme Court of Canada held that the Guidelines Order was constitutionally valid.  
[531] On the question of where the matter of the environment falls under the Constitution Act,  
1867, La Forest J, writing for the majority, wrote that the environment is not an enumerated head  
of power but touches several heads of power assigned to the federal government and the provinces:  
Ibid at 63-67. He noted that the environment is a complex, “abstruse” matter, with aspects that  
may come within both provincial jurisdiction and federal jurisdiction: Ibid at 64.  
[532] The Court in Oldman River also endorsed a broad view of the “environment”, at 37:  
I cannot accept that the concept of environmental quality is confined to the  
biophysical environment alone; such an interpretation is unduly myopic and  
contrary to the generally held view that the "environment" is a diffuse subject  
matter; ...  
Surely the potential consequences for a community's livelihood, health and other  
social matters from environmental change are integral to decision-making on  
matters affecting environmental quality, subject, of course, to the constitutional  
imperatives…  
Page: 153  
[533] Professor Hogg similarly describes the matter of the “environment” broadly, at § 30:31:  
The environment, comprising as it does “all that is around us”, is too diffuse a topic  
to be assigned by the Constitution exclusively to one level of government. Like  
inflation, it is an aggregate of matters, which come within various classes of  
subjects, some within federal jurisdiction and others within provincial jurisdiction.  
[534] La Forest J returned to the topic of the breadth of environmental concerns, touching on  
globalism, Canadian values, and pollution as a “sweeping subject”, in Hydro-Quebec at para 154:  
In Crown Zellerbach, I expressed concern with the possibility of allocating  
legislative power respecting environmental pollution exclusively to Parliament. I  
would be equally concerned with an interpretation of the Constitution that  
effectively allocated to the provinces, under general powers such as property and  
civil rights, control over the environment in a manner that prevented Parliament  
from exercising the leadership role expected of it by the international community  
and its role in protecting the basic values of Canadians regarding the environment  
through the instrumentality of the criminal law power. Great sensitivity is required  
in this area since, as Professor Lederman has rightly observed, environmental  
pollution “is no limited subject or theme, [it] is a sweeping subject or theme  
virtually all-pervasive in its legislative implications”; see W. R. Lederman, “Unity  
and Diversity in Canadian Federalism: Ideals and Methods of Moderation” (1975),  
53 Can. Bar Rev. 597, at p. 610.  
[535] Applicable to this Reference is the Court’s recognition in Oldman River at 69 that projects  
may have implications for both federal and provincial heads of power:  
What is important is to determine whether either level of government may  
legislate. One may legislate in regard to provincial aspects, the other federal  
aspects. Although local projects will generally fall within provincial  
responsibility, federal participation will be required if the project impinges on an  
area of federal jurisdiction as is the case here [emphasis added].  
[536] The Court characterized the Guidelines Order as having two fundamental aspects: a  
substantive aspect dealing with environmental impact assessment “to facilitate decision-making  
under the federal head of power through which a proposal is regulated” (and sustainable under the  
relevant s 91 head of power), and a “procedural or organizational element that coordinates the  
process of assessment, which can in any given case touch upon several areas of federal  
responsibility, under the auspices of a designated decision maker, or in the vernacular of  
the Guidelines Order, the initiating department’”: Oldman River at 73. The latter facet of the  
legislation was described as having “as its object the regulation of the institutions and agencies of  
the Government of Canada as to the manner in which they perform their administrative functions  
and duties” and unquestionably intra vires Parliament either as an adjunct of the particular  
Page: 154  
legislative powers involved, or, in any event, justifiable under the residuary power in s. 91:  
Ibid at 74.  
[537] As noted by Professor Hogg, “the effect of the Oldman River decision is to confer on the  
federal Parliament the power to provide for environmental assessment of any project that has any  
effect on any matter within federal jurisdiction”: Hogg at § 30.32.  
[538] In 2010, federal environmental assessment legislation was again challenged in Moses,  
when a proponent sought to develop a vanadium mine in Quebec. One of the issues was the  
applicability of CEAA, 1992. Canada said that a federal assessment was required because the mine  
was going to impact fish, requiring authorization from the Minister of Fisheries under s 35(2) of  
the Fisheries Act. While the details of Moses are set out below when considering whether an  
external legislative trigger tied to a federal head of power is constitutionally required (for example,  
the Fisheries Act), of relevance here is the double aspect doctrine. In Moses, the Court recognized  
that some activities or projects may have both a provincial and federal aspect over which each  
level of government can validly exercise law-making authority.  
[539] The majority in Moses observed that a vanadium mining project, considered in isolation,  
would be seen to fall within provincial jurisdiction. However, where the project has an adverse  
impact on fish habitat, the federal environmental regulatory system is engaged. Though resource  
projects may fall within provincial jurisdiction under s 92A, “a mining project anywhere in Canada  
that puts at risk fish habitat could not proceed without a permit from the federal Fisheries Minister,  
which he or she could not issue except after compliance with the CEAA: Moses at para 36. The  
non-renewable resources aspect falls within provincial jurisdiction, while the fisheries aspect”  
falls within federal jurisdiction: ibid. The dissent too agreed on this general point. Stating that  
“[t]he inquiry into whether federal jurisdiction can be validly invoked turns on whether the activity  
... can be viewed as having a federal aspect” (para 121), it found that “the Project’s impact on fish  
habitat engages federal jurisdiction” (para 124).  
3.  
Federal and Provincial Regulation of Environmental Effects:  
Cooperative Federalism  
[540] After Oldman River was decided in January of 1992, Hogg noted that “[t]he case for  
environmental impact assessment by a single, jointly-established, federal-provincial agency, with  
comprehensive powers delegated by both levels of government could not be clearer”: §30:32. Soon  
thereafter, on June 23, 1992, Canada passed CEAA, 1992, which, as noted, contemplated joint  
review panels between Canada and the provinces. Three days later Alberta did the same:  
Environmental Protection and Enhancement Act, SA 1992, c E-13.3, s 55.  
[541] In 1993, Alberta and Canada signed the Canada-Alberta Agreement for Environmental  
Assessment Cooperation, a bilateral agreement which detailed the operation of joint review panels  
to assess projects in cases involving overlapping jurisdiction. And in 1994, the Supreme Court of  
Page: 155  
Canada concluded in National Energy Board at 193 that two levels of government legislating at  
once in relation to environmental assessment is neither “unusual nor unworkable”.  
[542] This history illustrates both the reality of overlapping federal-provincial jurisdiction when  
it comes to the environmental assessment of certain local projects and concomitant recognition by  
Canada and provinces like Alberta that such overlap militates in favour of cooperation.  
[543] In Reference Re Pan-Canadian Securities Regulation, 2018 SCC 48 at paras 17-18 [Pan-  
Canadian Securities Reference], the Supreme Court of Canada recognized that the principle of  
cooperative federalism favors a harmonious reading of cooperative regulating schemes enacted by  
the provincial and federal governments, enabling each to operate comfortably within its own  
sphere:  
Cooperative federalism is an interpretative aid that is used when “interpreting  
constitutional texts to consider how different interpretations impact the balance  
between federal and provincial interests” (R. v. Comeau, 2018 SCC 15, [2018] 1  
S.C.R. 342, para. 78). Where possible, courts should favour a harmonious reading  
of statutes enacted by the federal and provincial governments which allows for  
them to operate concurrently (Rogers Communications Inc. v. Chateauguay (City),  
2016 SCC 23, [2016] 1 S.C.R. 467, at para. 38). …  
Cooperative federalism is often applied “to facilitate interlocking federal and  
provincial legislative schemes and to avoid unnecessary constraints on provincial  
legislative action” (Quebec (Attorney General) v. Canada (Attorney General), 2015  
SCC 14, [2015] 1 S.C.R. 693, at paras. 17-19). Broadly speaking, it “accommodates  
overlapping jurisdiction and encourages intergovernmental cooperation”, and  
therefore discourages courts from interfering with cooperative regulatory schemes  
so long as they are not incompatible with the boundaries dictated by the  
Constitution Act, 1867 [authorities omitted]. …  
See also Reference re Genetic Non-Discrimination Act, 2020 SCC 17 at paras 22-24.  
[544] A cautionary gloss was drawn over the principle of co-operative federalism in Rogers  
Communications Inc v Châteauquay (City), 2016 SCC 23 at para 39:  
[A]lthough co-operative federalism has become a principle that the courts have  
invoked to provide flexibility for the interpretation and application of the  
constitutional doctrines relating to the division of powers, such as federal  
paramountcy and inter jurisdictional immunity, it can neither override nor modify  
the division of powers itself. It cannot be seen as imposing limits on the valid  
exercise of legislative authority: Quebec (Attorney General) v. Canada (Attorney  
General), at paras. 17-19. …  
Page: 156  
[545] The principle of cooperative federalism supports concurrent operation of environmental  
protection statutes enacted by federal and provincial governments so that a single project may  
variously engage environmental regulations passed by both levels of government, each regulating  
a distinct and separate aspect of the project. Though there will be overlap, it is dealt with through  
cooperation and federalprovincial agreements.  
[546] In my view, environmental assessment regimes may be seen as paradigmatic examples of  
co-operative federalism. The question is whether Parliament has overstepped its bounds as  
circumscribed by s 91 of the Constitution Act, 1867, in the IAA and Regulation, or provisions  
within it. The majority of the Court in Oldman River addressed this point, (at 72):  
Because of its auxiliary nature, environmental impact assessment can only affect  
matters that are “truly in relation to an institution or activity that is otherwise  
within [federal] legislative jurisdiction”; see Devine v. Quebec (Attorney General),  
[1988] 2 S.C.R. 790, at p. 808. Given the necessary element of proximity that must  
exist between the impact assessment process and the subject matter of federal  
jurisdiction involved, this legislation can, in my view, be supported by the particular  
head of federal power invoked in each instance. In particular, the Guidelines  
Order prescribes a close nexus between the social effects that may be examined  
and the environmental effects generally. Section 4 requires that the social effects  
examined at the initial assessment stage be “directly related” to the potential  
environmental effects of a proposal, as does s. 25 in respect of the terms of reference  
under which an environmental assessment panel may operate. Moreover, where  
the Guidelines Order has application to a proposal because it affects an area of  
federal jurisdiction, as opposed to the other three bases for application enumerated  
in s. 6, the environmental effects to be studied can only be those which may have  
an impact on the areas of federal responsibility affected [emphasis added].  
[547] In Oldman River, the activity subject to environmental assessment a dam across the river  
was a project wholly within the province of Alberta but with environmental effects upon both  
federal and provincial interests. Both federal and provincial environmental legislation was  
implicated. This Reference, too, concerns both federal environmental assessment legislation, the  
IAA, and provincial environmental legislation, in Alberta, the Environmental Protection and  
Enhancement Act, RSA 2000, c E-12 [EPEA], as well similar legislation in other provinces.  
4.  
The Presumption of Constitutionality  
[548] The presumption of constitutionality favors a constitutional interpretation of the IAA. The  
presumption of constitutionality can be relevant to how the matter of an impugned law is  
characterized: Hogg at § 15:13. As noted in Siemens v Manitoba (Attorney General), 2003 SCC 3  
at para 33, [w]hen faced with two plausible characterizations of a law, courts should normally  
favour the one “which supports the law’s constitutional validity”. Similarly, where a legislative  
text is capable of bearing a meaning that makes it constitutionally valid, that meaning should be  
Page: 157  
adopted: Desgagnés Transport Inc v Wärtsilä Canada Inc, 2019 SCC 58 at para 28 [Desgagnés  
Transport].  
[549] An interpretation of the IAA as an environmental assessment regime intended to regulate  
environmental effects in federal jurisdiction and to work in concert with interlocking provincial  
environmental processes that are intended to regulate effects in provincial jurisdiction is consonant  
with the double aspect doctrine, cooperative federalism, and the presumption of constitutionality.  
B.  
Validity of the IAA and Regulation  
[550] The constitutional questions posed in this Reference treat the enabling legislation, the IAA,  
and its subsidiary Regulation separately, and Alberta’s approach is to analyse them separately.  
However, as a review of the legislation makes crystal clear, the IAA and the Regulation are  
legislatively a piece of whole cloth, woven together by their terms, informing each others’ content,  
and intended to operate in an integrated fashion. The trigger of the assessment process is s 7  
animated by the Project List of physical activities or designated projects in the Regulation;  
triggermeans the assessment process springs into action once a proponent advances a proposal  
for a designated project. The enabling legislation, the IAA, and its subsidiary legislation, the  
Regulation, must be read and interpreted together to discern Parliament’s true legislative intent.  
[551] Alberta submits that, even if the IAA is found constitutionally valid, the Regulation itself  
“fail[s] to establish any boundaries restricting the application of the IAA to projects clearly within  
federal jurisdiction and as such should be found ultra vires the Parliament of Canada”: Factum at  
para 120. This approach, which would require the separate consideration of the constitutionality  
of the IAA and the Regulation, has been rejected in cases where a statute and the regulation  
promulgated under it “were intertwined from the start”, and where “[t]he regulations gave concrete  
meaning and content to the statute and were indispensable to its classification for constitutional  
purposes”: R v Morgentaler, [1993] 3 SCR 463 at 480-81, 107 DLR (4th) 537 [Morgentaler cited  
to SCR], referring to Texada Mines Ltd v Attorney-General of British Columbia, [1960] SCR 713,  
24 DLR (2d) 81.  
[552] Regulations “complete and implement” the statutory scheme and therefore must be read  
within the context of the scheme, having regard to the language and purpose of their enabling Act:  
Ruth Sullivan, Sullivan on the Construction of Statutes, 6th ed (Markham, LexisNexis Canada Inc,  
2014) at 413. An impugned provision is not to be considered in isolation. Rather, it must be situated  
in context within the statutory scheme as a whole and the legislative history: Ward v Canada  
(Attorney General), 2002 SCC 17 at paras 19-23, [2002] 1 SCR 569 [Ward].  
[553] Similarly, in Syncrude Canada Ltd v Canada (Attorney General), 2016 FCA 160 at para  
33, the Federal Court of Appeal rejected the argument that an impugned provision must be read  
first in isolation, and only if the pith and substance cannot be resolved in that manner is it  
appropriate to examine the provision in the context of the entire scheme a proposed methodology  
described by the Court as “problematic as a matter of doctrine”. A regulation that on its face, and  
Page: 158  
when read alone, might appear to be regulating a matter within the jurisdiction of the other level  
of government must be considered in its proper context, in light of the entire scheme, to understand  
its true purpose and effect: Ibid at para 34.  
[554] Alberta’s approach to the Regulation poses the wrong question. The IAA and the  
Regulation work together and are informed by each other; they must be read and interpreted  
together. There is one legislative scheme to characterize here, and one “pith and substance”.  
[555] As to the constitutional analysis of the legislative regime, Hogg provides the approach  
required by this Reference: Hogg at §15:4. Sections 91 and 92 of the Constitution Act, 1867,  
respectively, set out the distribution of powers between the federal Parliament and the provincial  
legislatures. Each section lists the kinds of law competent to each level of government, giving  
legislative authority to “matters” coming within “classes of subjects”. There are two steps involved  
in judicial review: “the first step is to identify the matter(or pith and substance) of the challenged  
law; the second step is to assign the matter to one of the classes of subjects(or heads of legislative  
power)”: Ibid. As explained by Professor Hogg:  
The challenged statute is characterized as in relation to a "matter" (step 1) only  
to determine whether it is authorized by some head of power in the Constitution.  
The "classes of subjects" are interpreted (step 2) only to determine which one will  
accommodate the matter of a particular statute. The process is, in Laskin's words,  
"an interlocking one, in which the British North America Act and the challenged  
legislation react on one another and fix each other's meaning". Nevertheless, for  
purposes of analysis it is necessary to recognize that two steps are involved: the  
characterization of the challenged law (step 1) and the interpretation of the power-  
distributing provisions of the Constitution (step 2).  
[556] Each of the two steps characterization of the legislation and classification of the matter  
under federal and provincial heads of power will be considered in turn.  
1.  
Characterization  
[557] Both Parliament and the provincial legislatures have constitutional authority to pass  
legislation concerned with adverse impacts on the environment caused by physical activities or  
projects. To determine whether the IAA and Regulation are within Parliament’s constitutional  
authority, first it is necessary to determine the “pith and substance” of the impugned law.  
[558] The “pith and substance” of a legislative provision is “the dominant or most important  
characteristic of the challenged law”: Oldman River at 62; Hogg at §15:5.  
[559] In Securities Reference, the Supreme Court of Canada described the “pith and substance”  
analysis as follows at paras 6364:  
Page: 159  
The “pith and substance” analysis is used by Canadian courts to determine the  
constitutional validity of legislation from a division of powers perspective. The  
analysis looks at the purpose and effects of the law to identify its “main thrust” as  
a first step in determining whether a law falls within a particular head of power….  
Incidental effects may be discounted; the search is for the main thrust of the law  
(Canadian Western Bank, at para. 28).  
Intrinsic evidence, such as purpose clauses and the general structure of the statute,  
may reveal the purpose of a law. Extrinsic evidence, such as Hansard or other  
accounts of the legislative process, may also assist in determining a  
law’s purpose. The effects of a law include the legal effect of the text as well as  
practical consequences of the application of the statute (Lacombe, at  
para. 20; Kitkatla, at para. 54).  
[560] In GGPPA SCC, the Court reiterates that the pith and substanceshould be described as  
precisely as possible, capturing the law’s essential character in terms that are “as precise as the  
law will allow”: para 52. The call for precision is further refined at para 69: [w]hen characterizing  
a matter, a court must strive to be as precise as possible, because a precise statement more  
accurately reflects the true nature of what Parliament did and what it intended to do. The Supreme  
Court was critical of this Courts characterization of the legislation at issue as being about GHG  
emissionsgenerally, finding it was instead about establishing minimum national standards of  
GHG price stringency to reduce GHG emissions”: para 80. Moreover, “[c]ourts should generally  
hesitate to attribute to Parliament an intention to occupy an entire field: para 65 [emphasis added].  
I take this to mean that courts should be reluctant to find the purpose of federal legislation is to  
legislate over an entire subject matter, in that case, the regulation of GHG emissions.  
[561] Alberta describes the pith and substance or dominant character of the IAA as:  
Establishment of a comprehensive impact assessment regime that requires  
proposed resource developments and infrastructure projects to undergo a broad  
ranging assessment of their impacts, environmental and other, and to subject those  
projects to federal oversight and approval.  
[562] Alberta makes a similar argument to the one it made in the GGPPA Reference. There,  
Alberta essentially argued that Canada was trying to occupy the entire field of GHG regulation  
because if the pith and substanceof the Greenhouse Gas Pollution Pricing Act, SC 2018, c 12,  
s 186 is regulating GHGs”, and that is a matter of national concern under the POGG power, then  
provinces retain no ability to regulate GHGs (since the POGG power is exclusive and plenary).  
Similarly, by claiming the IAA is comprehensive, Alberta is essentially arguing that Canada is  
trying to take over the entire field of environmental assessment. That is, a federal decision-maker  
will make a determination about all aspects of a project such that there is nothing left for a  
provincial decision-maker to consider. The question is whether that is so. Certainly, the IAA can  
be interpreted so that the two assessment regimes operate cooperatively.  
Page: 160  
[563] Further, Alberta’s formulation of the pith and substance of the IAA and the Regulation  
assumes or suggests that their dominant purpose is to assert federal control over resource  
development and infrastructure projects. Alberta’s version of the pith and substance of the IAA and  
Regulation is not “as precise as the law will allow”, but is broad and general, missing the essential  
purpose of this project-based environmental assessment regime: to determine whether certain  
adverse environmental effects of designated projects are in the public interest - worth the  
environmental cost - to warrant government authorization to proceed.  
[564] On the other hand, Canada describes the “pith and substance”, or dominant character, of  
the IAA as to establish a federal environmental assessment process to protect against adverse  
environmental effects:  
a. on matters within federal jurisdiction (as listed in s 7).  
b. in the exercise of federal regulatory power in other existing federal schemes  
(s 8); and  
c. in relation to projects carried out on federal Crown lands, or by federal  
authorities outside Canada, or which engage the provision of financial  
assistance (ss 81-91).  
[565] While Canada’s view of the IAA and Regulation is more precise, it adverts to the effects of  
the environmental assessment regime and pre-judges the question of whether the essential  
character of the legislation is constitutionally permissible, an analysis that should occur at the  
classification stage.  
[566] In ascertaining the pith and substance of the IAA and Regulation, I consider first the  
purpose of the law, as revealed by intrinsic and extrinsic evidence, and then the effects of the law,  
both legal and practical.  
a.  
Purpose of the IAA and Regulation  
i. Intrinsic evidence  
The purpose of the IAA and Regulation shown through the Title,  
Preamble and Purpose provision  
[567] Parliament’s express purpose in passing the IAA is in its title, its preamble, and the  
statement of purpose in s 6.  
[568] The full name of the IAA is helpful in identifying Parliament’s purpose: GGPPA SCC at  
para 58. It is “An Act respecting a federal process for impact assessment and the prevention of  
significant adverse environmental effects”. The title tells us that the essential goal of the IAA is an  
environmental assessment regime for the “prevention of significant adverse environmental  
Page: 161  
effects”. The “significance” of the adverse environmental effects plays forward through the IAA  
decision-making process as a factor in determining whether a project will be authorized: s 63(b).  
[569] The preamble to a statute is “useful in constitutional litigation to illustrate the ‘mischief’  
the legislation is designed to cure and the goals Parliament sought to achieve”: GGPPA SCC at  
para 59. The content of the IAA Preamble is summarized at para 476 above. It can best be described  
as an expression of Canada’s commitment to, or recognition of, a set of high-level values and  
principles that underlie its project-based environmental assessment regime.  
[570] The IAA Purpose section carries these values forward by stating Parliament’s general and  
specific goals what the Act intends to accomplish:  
to foster sustainability: s 6(a);  
to protect components of the environment and the health, social and economic conditions  
within federal authority from adverse effects caused by a designated project: s 6(b);  
to establish a fair, predictable and efficient process for impact assessments in the interests  
of competitiveness, innovation, and sustainable economic development: s 6(b.1);  
to ensure that impact assessments consider all positive and adverse effects: s 6(c);  
to ensure federal authorities avoid adverse effects in federal jurisdiction or adverse or  
incidental effects: s 6(d);  
to promote cooperation between federal, provincial and Indigenous governments with  
respect to impact assessment: s 6(e);  
to promote communication and cooperation with Indigenous peoples and respect their s 35  
rights during impact assessment: ss 6(f), (g);  
to ensure public participation during impact assessment; to ensure impact assessment is  
completed in a timely manner: s 6(h);  
to ensure consideration of scientific, Indigenous and community knowledge: s 6(j);  
to ensure consideration of alternative means of carrying out the designated project: s 6(k);  
to ensure federal projects (s 81) avoid significant adverse environmental effects; to ensure  
assessment of cumulative effects of designated projects and consideration of federal  
policies and programs in impact assessments: ss 6(l), (m);  
to encourage improvement of impact assessment through follow-up programs: s 6(n).  
[571] Parliament’s purpose or goal in passing the IAA and the Regulation is also demonstrated  
by operation of the project-based environmental assessment regime: its trigger in s 7 in concert  
with the Regulation Project List; its effectuation through the environmental assessment process;  
its interjurisdictional mechanisms; and its multifactorial approach at the decision-making stage.  
Page: 162  
ii.  
Extrinsic evidence  
[572] In determining legislative purpose, a court may consider the legislative history of a statute,  
including government policy papers and legislative debates: GGPPA SCC at para 62.  
[573] A review of the extrinsic evidence relevant to the enactment of Bill C-69 confirms that  
Parliament’s purpose was to establish a federal environmental assessment regime with several  
related aims: to foster sustainability and facilitate planning and information gathering for projects  
that may have effects on areas within federal jurisdiction, where the public interest involves  
considering both positive and negative effects.  
[574] Comments by the Minister of the Environment during legislative debates on Bill 69 explain  
the nature of the impact assessment process and its focus on the effects of projects under review.  
For example, in her Introductory Remarks to the Standing Committee on Environment and  
Sustainable Development on May 3, 2018, the Minister described Bill C-69 as follows:  
The Government of Canada is committed to ensuring that Canada's major projects  
are developed in a way that is informed by rigorous science, evidence, and  
[I]ndigenous knowledge. They must also be consistent with Canada’s climate plan,  
protect our rich natural environment, respect the rights of [I]ndigenous peoples, and  
support our economy.  
Our priority remains to effectively advance both Canada's economic progress and  
our environmental responsibilities. These values are at the core of Bill C-69. …  
Bill C-69 restores robust oversight and thorough impact assessments that take into  
consideration not only the negative environmental effects of a project, but also the  
environmental, economic, health and social impacts.  
Impact assessments will also consider how projects are consistent with our  
environmental obligations and climate change commitments, including with the  
Paris Agreement.212  
[575] In an earlier standing committee meeting, the Minister had explained that the review of a  
project’s impacts is relevant to a sustainability determination, stating that “the sustainability test  
does require looking at the positive and negative impacts, including economic, environmental,  
social and health impacts”.213 She further noted that “[d]ecisions will be based on whether a  
project with adverse effects is in the public interest” and include consideration of “the project's  
212  
House of Commons, Standing Committee on Environment and Sustainable Development, Evidence, 42-1, No 110  
(3 May 2018) at 1-2 (Hon Catherine McKenna).  
213  
House of Commons, Standing Committee on Environment and Sustainable Development, Evidence, 42-1, No 099  
(22 March 2018) at 17 (Hon Catherine McKenna).  
Page: 163  
contribution to sustainability, impacts on [I]ndigenous peoples and their rights, and mitigation  
measures that are proposed to reduce the project’s impacts on Canada’s ability to meet its  
environmental obligations and climate change commitments”.214  
[576] At Third Reading in the House of Commons, the Minister noted that the Bill improves  
decision making through “project reviews that consider a wide range of positive and negative  
impacts on the economy, health, [I]ndigenous rights, and communities, in addition to the  
environment”215, all factors said to play into the assessment of whether a project is in the public  
interest.216 This theme re-emerged at a Senate Standing Committee, where the Minister noted that  
impact assessments will consider effects on the environment, and the “long-term social, health and  
economic impacts”, including “positive economic contributions”, all of which inform a decision  
on sustainability.217  
[577] The legislative debates also emphasize the focus on information gathering and planning  
built into the impact assessment process as well as inter-jurisdictional collaborations. For example,  
before the House of Commons Standing Committee, the Minister noted:  
… project reviews need to be predictable, provide regulatory certainty, and work  
across multiple jurisdictions. The new legislation proposes to have one agency, the  
impact assessment agency of Canada, lead all major project reviews and coordinate  
with [I]ndigenous peoples. One project, one assessment, is a guiding principle to  
drive co-operative reviews and avoid duplication[...]  
A new early planning phase will engage jurisdictions, potentially affected  
[I]ndigenous peoples and communities, to ensure that key issues are raised early so  
that project proponents know at the outset what is expected from them.218  
214  
Ibid at 2.  
215  
Bill C-69 An Act to enact the Impact Assessment Act and the Canadian Energy Regulatory Act, to amend the  
Navigation Protection Act and to make consequential amendments to other Acts”, 3rd reading, House of Commons  
Debates, 42-1, No 313 (12 June 2018) at 20775.  
216 Ibid at 20778.  
217 The Senate, Standing Senate Committee on Energy, the Environment and Natural Resources, Evidence, 42-1, No  
68 (2 May 2019) (Hon Catherine McKenna).  
218  
House of Commons, Standing Committee on Environment and Sustainable Development, Evidence, 42-1, No 099  
(22 March 2018) at 2 (Hon Catherine McKenna).  
Page: 164  
[578] The centrality of early planning and engagement was reiterated by the Minister in her  
introductory remarks at Third Reading.219  
[579] Early planning, information gathering, and collaboration arose again at the Standing Senate  
Committee on Energy, the Environment and Natural Resources, where the Minister’s introductory  
remarks included the following:  
… there is broad support for the early planning phase, an essential component of  
the new impact assessment system that reflects what we know to be best practice  
for industry. Early planning provides for a structured process, led by the impact  
assessment agency, to engage with stakeholders, potentially affected Indigenous  
peoples and communities, regulators and cooperating jurisdictions. It ensures key  
issues are raised early in the process, leading to better project design and ensuring  
project proponents know what’s expected of them at the outset. Additionally,  
upfront investment in early planning allows for faster reviews and more timely  
decisions. This is a key element of our “one project, one review” approach, ensuring  
the needs of all partners, whether provinces or federal life cycle regulators are met  
through a single process ... .220  
[580] The focus on effects within federal jurisdiction was also a subject of discussion in the  
legislative debates on Bill C-69. Before the Senate Standing Committee on May 2, 2019, the  
Minister noted that the environment is a joint field of jurisdiction between the provinces and the  
federal government and confirmed that the legislative regime would examine “impacts in fields of  
federal jurisdiction”. In discussing the Project List in March 2018, the Minister noted that  
consultation on the List was ongoing, but that the focus would be, not on federal funding, but on  
“projects that have the most potential for adverse effects in areas of federal jurisdiction related to  
the environment”.221 Before the May 3, 2018, House of Commons Standing Committee, the  
Minister reiterated that consultation on the Project List focused on the review of “major projects  
with the potential for adverse environmental impacts that are clearly within federal jurisdiction”.222  
[581] The RIAS bears out this approach, identifying the rationale for the Project List as “to  
identify those major projects with the greatest potential for adverse effects on areas of federal  
jurisdiction related to the environment, so that they can enter into the impact assessment process”:  
RIAS at 5661 [emphasis added]. The RIAS further notes that the Project List uses a “criteria-based  
219 “Bill C-69 An Act to enact the Impact Assessment Act and the Canadian Energy Regulatory Act, to amend the  
Navigation Protection Act and to make consequential amendments to other Acts”, 3rd reading, House of Commons  
Debates, 42-1, No 313 (12 June 2018) at 20774-8 (Hon Catherine McKenna).  
220  
The Senate, Standing Senate Committee on Energy, the Environment and Natural Resources, Evidence, 42-1, No  
68 (2 May 2019) (Hon Catherine McKenna).  
221  
House of Commons Standing Committee (22 March 2018) at 18.  
222  
House of Commons Standing Committee (3 May 2018) at 7.  
Page: 165  
approach”, using the List under CEAA 2012 as a starting point, and that the changes to the Project  
List “are not expected to significantly change the total number of projects that are subject to federal  
impact assessment annually compared to the number under the CEAA, 2012: RIAS at 5661.  
iii.  
Conclusion as to purpose of the IAA and Regulation  
[582] The extrinsic and intrinsic evidence shows that Parliament’s purpose in passing the IAA  
and its companion Regulation is to foster sustainability by establishing a federal project-based  
impact assessment regime that seeks to limit adverse effects on identified areas of claimed federal  
jurisdiction by subjecting certain projects to review to determine whether said effects are in the  
public interest.  
b.  
Effects of the IAA and Regulation  
[583] Concisely described, a “law’s legal effects are discerned from its provisions by asking  
“how the legislation as a whole affects the rights and liabilities of those subject to its terms”:  
GGPPA SCC at para 70, citing Morgentaler at 482. Conversely, its practical effects are “‘side’  
effects flow[ing] from the application of the statute which are not direct effects of the provisions  
of the statute itself”: GGPPA SCC at para 77, citing Kitkatla Band v British Columbia (Minister  
of Small Business, Tourism and Culture), 2002 SCC 31 at para 54.  
i.  
The effects of the IAA and Regulation shown through s 7  
and the Project List  
[584] Section 7 is engaged when a proponent’s proposal for development is a “designated  
project, usually because it is on the Project List under the Regulation. The proposed project is  
then within the purview of the IAA and the impact assessment process is triggered. A proponent  
must follow the legislative regime, a prescription for authorization, before it can proceed lawfully  
(s 10) and may only proceed with the project when authorized, most notably if the Agency decides  
no impact assessment is required (s 7(3)(a)) or the proponent complies with conditions in a  
decision statement (s 7(3)(b)).  
[585] The legal effect of the IAA and Regulation is that proponents of “physical activities” or  
“designated projects” that may cause effects on the environment in purported areas of federal  
jurisdiction must participate in the federal environmental assessment regime or face penalties.  
ii.  
The effects of the IAA and Regulation shown through the  
environmental assessment process  
[586] One effect of the IAA and Regulation is that the proponent of a “designated project” may  
be required to proceed through the four phases of the impact assessment regime under the auspices  
of the Agency: planning, preparation of the impact statement, conduct of the impact assessment,  
issuance of the decision, followed by implementation of the decision. The proponent must work  
Page: 166  
with the Agency through the steps necessary for a determination as to whether an impact  
assessment is necessary: ss 10-15, 16(1)-(2).  
[587] A second effect is that if the Agency decides an impact assessment is necessary (and the  
Minister does not approve the substitution of a process under s 31), the Agency must provide the  
proponent with a notice of the commencement of the impact assessment, setting out the  
information required and plans for cooperation with other jurisdictions, Indigenous peoples, public  
participation, and issuance of permits: s 18. The Agency will determine the scope of the s 22 factors  
that the proponent must address in its impact statement, including the mandatory factors,  
Indigenous and community knowledge, comments from the public and other jurisdictions, as well  
as regional, strategic, and Indigenous assessments: s 18(1.2).  
[588] The proponent must then address and provide information and any plans for cooperation  
with other jurisdictions as required by the Agency. These too are legal effects.  
iii.  
The effects of the IAA shown through decision-making:  
authorization of projects in the public interest  
[589] Though the information-gathering and factors considered in the impact assessment process  
are broad ranging, s 28 (3) of the IAA requires the impact assessment report to focus on significant  
effects within federal jurisdiction. Both the Minister and Governor in Council must base their  
public interest decisions on the impact assessment report and the s 63 factors. The proponent will  
need to marshal its case to address the s 63 factors that will form the basis of decision-making.  
iv.  
Conclusion as to effects of the IAA and Regulation  
[590] In conclusion, the effects of the IAA and Regulation are found in its procedural and  
substantive content. There are legal effects: once the IAA regime is triggered by s 7 and the Project  
List, proponents of projects identified on the Project List are prohibited from proceeding unless  
and until they have complied with the environmental assessment regime in the IAA. Failure to  
comply with the legal requirements of the IAA may result in penalties or failure to obtain the  
necessary approval for the project to proceed. There are practical effects: the IAA process to  
decision-making requires the time and resources of the Agency, the proponent, and other  
implicated jurisdictions, such as provincial environmental authorities or First Nations, as well as  
affected communities. The process may result in delay.  
c.  
Conclusion as to Pith and Substance of the IAA and Regulation  
[591] While finding that challenged provisions of the Guidelines Order were validly enacted in  
Oldman River, La Forest J described the impact assessment approach at 71:  
Environmental impact assessment is, in its simplest form, a planning tool that is  
now generally regarded as an integral component of sound decision-making. Its  
fundamental purpose is summarized by R. Cotton and D. P. Emond in  
Page: 167  
"Environmental Impact Assessment", in J. Swaigen, ed., Environmental Rights in  
Canada (1981), 245, at p. 247:  
The basic concepts behind environmental assessment are simply  
stated: (1) early identification and evaluation of all potential  
environmental consequences of a proposed undertaking; (2) decision  
making that both guarantees the adequacy of this process and reconciles,  
to the greatest extent possible, the proponent's development desires with  
environmental protection and preservation.  
As a planning tool it has both an information-gathering and a decision-making  
component which provide the decision maker with an objective basis for granting  
or denying approval for a proposed development ….  
[592] Both the IAA with its Regulation and the Guidelines Order at issue in Oldman River  
involved a process for environmental assessment: use of a planning tool intended to be an integral  
component of sound decision-making with respect to proposed activities and projects that may  
have environmental effects. The IAA is different from the Guidelines Order in that it is project-  
based and certain decisions pursuant to which projects are assessed are contained internally. The  
Regulation identifies projects with potential environmental effects within the federal sphere that  
are subject to a regulatory process triggered by s 7 and culminate in a decision as to whether an  
assessment is necessary and if so, whether the project is authorized to proceed because certain  
enumerated environmental effects are in the public interest. However, the IAA and Regulation  
remain essentially a planning tool, effectuated by the Agency-led administrative infrastructure to  
facilitate information-gathering, decision-making, and enforcement.  
[593] In my view, the pith and substance of the IAA and Regulation is to establish a federal  
environmental assessment regime that facilitates planning and information gathering with respect  
to specific projects to inform decision-making, cooperatively with other jurisdictions, as to  
whether the project should be authorized to proceed on the basis that identified adverse  
environmental effects purported to be within federal jurisdiction are in the public interest.  
2.  
Classification  
[594] In considering the constitutional validity of legislation relating to the environment, it is  
necessary to look at the catalogue of powers assigned to Parliament and the provincial legislatures  
to see if the exercise of authority in the impugned legislation falls within one or more of the powers  
assigned to the government that enacted it: Oldman River at 65; Hydro-Quebec at para 112;  
GGPPA SCC at para 533. As noted by La Forest J in Oldman River at 73, “[t]here is no  
constitutional obstacle preventing Parliament from enacting legislation under several heads of  
power at the same time” [emphasis added].  
[595] Having identified the matter of the IAA and Regulation, I turn next to the interpretation of  
the “classes of subjects” in the Constitution Act, 1867, to determine which ones, if any, will  
Page: 168  
accommodate the “matter” of the impugned legislation: Hogg at § 15.4. The question is whether  
the subject matter of the challenged legislation genuinely falls within the head of constitutional  
power relied upon to support its validity; where it does, the legislation will be upheld on the basis  
that it is intra vires, and therefore valid: Pan-Canadian Securities Reference at para 86.  
[596] Accepting that “environmental regulation” is too broad to be “the matter” of the IAA and  
the Regulation, nor is it a single matter, nor is it a discrete head of power, legislative authority over  
environmental regulation is distributed and parceled out between various federal and provincial  
heads of power. As the Court in Oldman River stated at 67-68:  
It must be noted that the exercise of legislative power, as it affects concerns relating  
to the environment, must, as with other concerns, be linked to the appropriate head  
of power, and since the nature of the various heads of power under the Constitution  
Act, 1867 differ, the extent to which environmental concerns may be taken into  
account in the exercise of a power may vary from one power to another. For  
example, a somewhat different environmental role can be played by Parliament in  
the exercise of its jurisdiction over fisheries than under its powers concerning  
railways or navigation since the former involves the management of a resource, the  
others, activities…  
[597] Following the decision in Oldman River, author Steven Kennett suggested a distinction  
between activities over which Parliament has “comprehensive” environmental jurisdiction (such  
as interprovincial railways, the example used in Oldman River) and activities which, because they  
merely touch on or have consequences for an area of federal competence, are subject only to  
“restricted” or limited federal jurisdiction. Comprehensive jurisdiction would permit Parliament  
to regulate all the environmental consequences of an activity, where the activity is referred to  
directly or implicitly under a federal head of power. Limited federal jurisdiction would apply to  
activities that are not directly referred to in a federal head of power but have consequences for an  
area of federal competence; the extent of jurisdiction would be limited to “addressing these  
consequences”.223 Noting the distinct forms of federal authority over activities and the necessity  
for a holistic approach to environmental assessment, the author makes the case “that federal-  
provincial cooperation is required if [environmental assessment] is to achieve its full potential  
when both levels of government have jurisdictional interests regarding an activity.”224  
[598] Regardless of nomenclature, there is a distinction between environmental assessment of  
activities that are explicitly or implicitly within federal heads of power, and environmental  
assessment of activities that may have effects on or consequences for areas of federal competence.  
A useful exercise for analyzing whether the IAA and Regulation regime genuinely operates within  
federal jurisdiction is to distinguish between those activities or projects in the Regulation Project  
223  
See Steven A Kennett, “Federal Environmental Jurisdiction After Oldman” (1993) 38:1 McGill L J 180 at 186-  
189.  
224  
Ibid at 203.  
Page: 169  
List that are indisputably tied, explicitly or implicitly, to a federal head of power, and those  
activities or projects in the Project List that are prima facie tied to a provincial head of power but  
may have effects within areas of federal jurisdiction, thus narrowing the focus of the inquiry.  
a.  
Matters in the IAA Regulation Project List prima facie Within  
s 91 of the Constitution Act, 1867  
[599] In Desgagnés Transport at para 39, the Supreme Court recognized that “classification may  
sometimes be self-evident and thus constitute a mere formality once the law is properly  
characterized. Otherwise, classification requires considering the scope of the relevant head of  
power (see Reference re Securities Act at paras 65, 69; Reference re Assisted Human Reproduction  
Act, per LeBel and Deschamps JJ., at para. 159; Ward v. Canada (Attorney General), 2002 SCC  
17, [2002] 1 S.C.R. 569, at para. 29; Hogg, at pp. 15-6 and 15-7)”: Ibid.  
[600] As touched on previously, many of the designated physical activities or projects on the  
Project List in the Regulation Schedule involve subject matters whose classification within s 91 of  
the Constitution Act, 1867 is self-evident and beyond dispute. These include:  
physical activities or projects located within a National Park, federal protected wildlife  
area, bird sanctuary or protected marine area (ss 1-11);  
specified matters involving the military or defence (ss 12-17);  
uranium mines or mills (ss 20-23);  
nuclear facilities (ss 26-29) (though s 29 appears to be contentious);  
offshore oil or gas facilities (ss 34-36);  
new international electrical transmission lines or inter-provincial power lines designated  
under the Canadian Energy Regulator Act (s 39);  
offshore oil and gas pipelines (s 40 - 41) (pipelines: depending on whether interprovincial);  
offshore wind power generating facilities (ss 44-45);  
aerodromes or runways (ss 46-47);  
international or interprovincial bridges or tunnels (ss 48-49);  
canals or causeways in navigable waters (ss 49-50); and  
marine terminals (ss 52-53).  
b.  
Matters in the IAA Regulation Project List prima facie Within  
s 92 of the Constitution Act, 1867  
[601] This Reference is about the remaining matters designated physical activities or projects  
on the Project List in the Regulation Schedule that prima facie fall within s 92(10) of the  
Constitution Act, 1867 as being “Local Works and Undertakings” or 92A(1) of the Constitution  
Act, 1867 as relating to “exploration, ... development, conservation, and management of non-  
renewable natural resources ... in the province” or “development, conservation and management  
of sites and facilities in the province for the generation and production of electrical energy”:  
Page: 170  
mines and metal mills (ss 18-19, 24-25);  
oil, gas and other fossil fuel facilities (ss 30-33, 37-38);  
renewable energy (ss 42-43);  
new public highways that require 75 km or more of new right of way (s 51);  
railways and railway yards (ss 54-55);  
hazardous waste (ss 56-57); and  
water projects (ss 58-61).  
Is it constitutionally permissible for the federal environmental assessment regime to regulate  
environmental “effects”, said to be in federal jurisdiction, caused by such projects?  
c.  
Section 7 and the Regulation: Environmental Effects upon  
Areas of Federal Jurisdiction  
[602] Section 7 is the key to the operation of the IAA and Regulation. It uses language that,  
literally interpreted, contemplates assessment of “designated projectsthat may have  
environmental effects causing changes to certain components of the environment said to be within  
the legislative authority of Parliament. Section 7 incorporates by reference types of “designated  
projects” in the Regulation Project List. And as noted, the effects listed in s 7 mirror the definition  
of “effects within federal jurisdiction” at the centre of the decision made by the Minister and  
Governor in Council in ss 60 and 62.  
[603] In analysing s 7, it is helpful to recall that the environmentis broadly defined as the  
components of the Earth including “(a) land, water and air, all layers of the atmosphere; (b) all  
organic and inorganic matter and living organisms; and (c) the interacting natural systems...”; and  
“effects” defined as “changes to the environment or to health, social or economic conditions and  
the positive and negative consequences of these changes”: s 2.  
[604] Section 7 puts these concepts to work in this fashion: the proponent of a designated  
projectis prohibited from doing anything to carry out that project if it may cause effects”,  
including change to the environmentin areas, variously described as in federal jurisdiction:  
7(1) Subject to subsection (3), the proponent of a designated project must not do  
any act or thing in connection with the carrying out of the designated project, in  
whole or in part, if that act or thing may cause any of the following effects:  
(a) a change to the following components of the environment that are within  
the legislative authority of Parliament:  
(i) fish and fish habitat, as defined in subsection 2(1) of the Fisheries Act,  
(ii) aquatic species, as defined in subsection 2(1) of the Species at Risk Act,  
Page: 171  
(iii) migratory birds, as defined in subsection 2(1) of the Migratory Birds  
Convention Act, 1994, and  
(iv) any other component of the environment that is set out in Schedule 3;  
(b) a change to the environment that would occur  
(i) on federal lands,  
(ii) in a province other than the one in which the act or thing is done, or  
(iii) outside Canada;  
(c) with respect to the Indigenous peoples of Canada, an impact occurring  
in Canada and resulting from any change to the environment on  
(i) physical and cultural heritage,  
(ii) the current use of lands and resources for traditional purposes, or  
(iii) any structure, site or thing that is of historical, archaeological,  
paleontological or architectural significance;  
(d) any change occurring in Canada to the health, social or economic conditions  
of the Indigenous peoples of Canada; or  
(e) any change to a health, social or economic matter within the legislative  
authority of Parliament that is set out in Schedule 3.  
(2) The Governor in Council may, by order, amend Schedule 3 to add or remove a  
component of the environment or a health, social or economic matter.  
[emphasis added]  
[605] In my view, the language used in s 7 is jurisdiction-limiting. It clearly contemplates that  
the prohibited effects are restricted to those falling within federal jurisdiction, particularly as the  
effects listed in s 7 are self-defined as being “effects within federal jurisdiction”. It is true that  
simply defining effects as being within federal jurisdiction does not make it so. However, as  
catalogued below, I find that each of these s 7 effects fall within a head of federal power under s  
91 of the Constitution Act, 1867. In other words, the IAA regime applies specifically to effects that  
are changes to the environment within federal jurisdiction.  
[606] This also holds true for the projects that are really at issue in this case those located  
entirely within a province, and prima facie falling within s 92 or 92A of the Constitution Act, 1867.  
Those local or “intra-provincial” projects on the Project List are projects which are being assessed  
Page: 172  
for the purpose of determining whether the effects within federal jurisdiction (e.g., on fish and fish  
habitat, aquatic species, migratory birds, etc.) caused by the project are in the public interest. An  
excellent example is an in situ oil sands extraction facility, designated in the Regulation Schedule  
under Oil, Gas and Other Fossil Fuels, at s 32:  
The construction, operation, decommissioning and abandonment of a new in  
situ oil sands extraction facility that has a bitumen production capacity of  
2000 m3/day or more …  
[607] The construction of in situ projects may cause effects that change “components of the  
environment that are within the legislative authority of Parliament”, such as to fish and fish habitat,  
aquatic species, and migratory birds. Various parties referred to a May 2019 “Discussion Paper on  
the Proposed Project List” published by the Government of Canada. It says this of onshore oil and  
gas:  
Projects that process or consume large quantities of oil and gas have impacts in  
areas of federal jurisdiction due to their greenhouse gas emissions. They may also  
have adverse effects to fish and fish habitat and migratory birds through land  
disturbance, air and water pollution and water usage, accidental spills, flaring, as  
well as through the incidental activities that may be needed to transfer the oil and  
gas products to or from the facility or to provide power for the facility.225  
[608] The Discussion Paper goes on to note that certain project types, including certain in situ  
projects, were “determined as having the greatest potential for adverse environmental effects in  
areas of federal jurisdiction, primarily due to their potential for greenhouse gas emissions, as well  
as, potential effects on fish and fish habitats”: 10  
[609] Alberta’s evidence, as noted, includes the affidavit of Paul Tsounis, an employee with the  
Alberta Department of Energy. At para 11 of his affidavit, Mr. Tsounis notes it is estimated that  
approximately 81% of Alberta's oil sands resource will be developed using in situ methods rather  
than mining methods[emphasis added], a figure said to derive from Natural Resources Canada  
data attached as Exhibit B”: Record at C4. That data provides that mining accounts for 47% of  
current production and in situ 53%. However, in terms of future development based on oil  
reserves, mining is projected to make up 19% and in situ production 81%: Ibid at C14-15. In other  
words, while mining vs the in situ method is currently roughly equal, in situ is expected to overtake  
mining substantially going forward. It is in this latter sense (i.e., future projection) that the 80%  
figure is accurate.  
[610] It is correct that s 7 of the IAA and the Regulation apply to effects of purely “intra-  
provincial” projects that prima facie fall within ss 92(10) and 92A(1) of the Constitution Act, 1867,  
225  
Canada, Discussion Paper on the Proposed Project List: A Proposed Impact Assessment System (May 2019) at  
10 (Record at A331 A358) [Discussion Paper].  
Page: 173  
such as in situ oil sands extraction facilities. However, the federal assessment regime is intended,  
designed, and operationally limited to apply only to the effects that are within federal jurisdiction.  
[611] Moreover, s 7 cannot be read in isolation from the rest of the IAA. While s 7 itself speaks  
of effects generally (which could include “positive” or “neutral” effects), it is clear the IAA is  
ultimately concerned with adverse effects within federal jurisdiction: ss 60-64. As the long title of  
the legislation itself notes, the IAA is designed to protect against “adverse environmental effects”.  
The prohibitions in s 7 are broader, presumably for administrative purposes: Parliament seeks to  
place a temporary hold on a project to determine their effects before they proceed, whereas a  
prohibition limited to adverse effects could jeopardize that approach by allowing proponents to  
claim that effects on federal jurisdiction are neutral and forge ahead, but at the end, they turn out  
not to be so. However, these broad prohibitions are nevertheless in service of Parliament’s  
narrower goal of determining whether certain adverse affects within federal jurisdiction are in the  
public interest, which is why the screening decision by the Agency in s 16 of the IAA seeks to  
eliminate from the assessment process designated projects not thought to have adverse effects  
within federal jurisdiction.  
[612] With this in mind, I turn now to the specific triggers in s 7 of the IAA and explain why, in  
my view, each is within federal jurisdiction.  
i.  
Section 7(1)(a)(i) change to fish and fish habitat, as  
defined in s 2(1) of the Fisheries Act, within the legislative  
authority of Parliament: the Fisheries Power under  
s 91(12) of the Constitution Act, 1867  
[613] Section 7(1)(a)(i) of the IAA prohibits a proponent from doing anything to carry out a  
designated project that may cause a change to “fish and fish habitat”, defined in s 2(1) of the  
Fisheries Act, RSC, 1985, c F-14, within the legislative authority of Parliament.  
[614] Section 91(12) of the Constitution Act, 1867, provides that Parliament has exclusive  
legislative authority over the “Sea Coast and Inland Fisheries”.  
[615] As explained in Hogg, the power over fisheries under s 91(12) includes the authority to  
legislate for the preservation of fish, for example, to regulate fishing operations by establishing  
closed seasons, and to prohibit the use of destructive fishing methods, regardless of who owns the  
fishing rights: Hogg at § 30:26 [emphasis added]. Parliament also has the power “to protect the  
environment of fish, for example, to ensure fish habitats are not polluted, though it is not a general  
power to regulate water pollution: ibid [emphasis added].  
[616] Legislation to protect fisheries by “preventing substances deleterious to fish [from]  
entering into waters frequented by fish” is a proper concern of legislation under s 91(12):  
Northwest Falling Contractors v The Queen, [1980] 2 SCR 292 at 301, 113 DLR (3d) 1 [Northwest  
Falling Contractors cited to SCR]. The fisheries resource “includes the animals that inhabit the  
Page: 174  
seas. But it also embraces commercial and economic interests, aboriginal rights and interests, and  
the public interest in sport and recreation”: Ward at para 41.  
[617] It is true that s 91(12) does not afford Parliament jurisdiction over all aspects of fish. For  
instance, Parliament has no ability to legislate in relation to the processing and marketing of fish:  
Reference re Certain Sections of the Fisheries Act, 1914, [1930] AC 111 at 122 (PC). However,  
the kinds of changes contemplated in s 7(1)(a)(i) are clearly directed to the preservation of fish  
and the protection of fish habitat matters which indisputably fall within s 91(12) given that  
they are restricted to changes caused by proponents of designated projects. The reach of the IAA  
is obviously informed by the Regulation, and vice versa. Neither should be read in isolation.  
[618] Nor do I read the IAA as even purporting to claim jurisdiction over all aspects of fish.  
Rather, s 7(1)(a)(i) is limited to changes to fish and fish habitat “within the legislative authority of  
Parliament”, a phrase confined to subsection (a) of s 7(1) rather than applying to the whole  
catalogue of effects listed in s 7. This suggests Parliament understood that components of the  
environment listed in s 7(1)(a) would not necessarily fall within federal jurisdiction in all aspects  
and sought to limit its reach accordingly.  
[619] Finally, I reject the contention that s 7(1)(a)(i) of the IAA is inconsistent with Fowler v The  
Queen, [1980] 2 SCR 213 [Fowler]. In Fowler, the Supreme Court of Canada struck down s 33(3)  
of the Fisheries Act, RSC 1970, c F-14 which prohibited activities like logging which put “any  
slash, stumps or other debris into any water frequented by fish” – because the provision made “no  
attempt to link the proscribed conduct to actual or potential harm to fisheries”: 226 [emphasis  
added]. Under the IAA, conversely, Parliament is clearly focused on activities thought to cause  
harm (i.e., have an adverse effect) to fish and fish habitat. Section 7(1)(a)(i) is in service of  
protecting against such harm, even if the harm is only potential and will not materialize in every  
case. Moreover, because the public interest determination under ss 60 or 62 of effects listed in s  
7(1)(a)(i) must be tied to actual adverse effects on fish and/or fish habitat, designated projects not  
linked to the harm of fisheries will not ultimately be prohibited from proceeding under s 7.  
[620] Accordingly, s 7(1)(a)(i) of the IAA is properly anchored in Parliament’s authority to  
legislate for the protection of fish and regulation of their environment under s 91(12) of the  
Constitution Act, 1867.  
ii.  
Section 7(1)(a)(ii) change to aquatic species, as defined  
in ss 2(1) of the Species at Risk Act, within the legislative  
authority of Parliament: the Fisheries Power under  
s 91(12) of the Constitution Act, 1867  
[621] For similar reasons, I also agree with Canada’s contention that aquatic species fall under  
Parliament’s constitutional authority over fish under s 91(12) of the Constitution Act, 1867.  
Page: 175  
[622] Subsection 2(1) of the Species at Risk Act, SC 2002, c 29, defines “aquatic species” as “a  
wildlife species that is a fish, as defined in s 2 of the Fisheries Act, or a marine plant, as defined  
in s 47 of that Act.” Section 47 of the Fisheries Act defines marine plants to include “all benthic  
and detached algae, marine flowering plants, brown algae, red algae, green algae, and  
phytoplankton.”  
[623] In Northwest Falling Contractors, at 300, in discussing a protective provision in the same  
version of the Fisheries Act considered in Fowler, Martland J wrote that shellfish, crustaceans and  
marine animals, which are included in the definition of “fish” by s 2 of that Act, are all part of  
the system which constitutes the fisheries resource; the power to control and regulate that resource  
“must include the authority to protect all those creatures which form a part of that system”.  
[624] Accordingly, s 7(1)(a)(ii) of the IAA is properly anchored in Parliament’s authority to  
legislate for the protection of fish under s 91(12) of the Constitution Act, 1867.  
iii.  
Section 7(1)(a)(iii) change to migratory birds, as  
defined in ss 2(1) of the Migratory Birds Convention Act,  
1994, within the legislative authority of Parliament:  
Imperial Treaty Power under s 132 of the Constitution  
Act, 1867  
[625] Section 7(1)(a)(iii) of the IAA prohibits proponents from doing anything to carry out a  
designated project if doing so may cause a change to migratory birds, as defined in ss 2(1) of the  
Migratory Birds Convention Act, 1994, within the legislative authority of Parliament.  
[626] Section 132 of the Constitution Act, 1867 provides:  
The Parliament and Government of Canada shall have all powers necessary or  
proper for performing the Obligations of Canada or of any Province thereof, as Part  
of the British Empire, towards Foreign Countries, arising under Treaties between  
the Empire and such Foreign Countries.  
[627] As stated in Hogg at § 11.12: “the federal Parliament has the power to implement Empire  
treatiesunder s. 132, but no power to implement Canadian treaties under s. 132”. Section 132  
authorized the performance of treaty obligations which arose under Treaties between the Empire  
and ... Foreign Countries, but not those which arose under treaties between Canada and foreign  
countries.  
[628] Canada submits that s 132 of the Constitution Act, 1867 authorizes legislation  
implementing Imperial treaties and includes jurisdiction to enact legislation going beyond the  
narrow terms of the treaty so long as it is ancillary to the treaty. One such treaty between the British  
Empire and the United States that remains in force today is the 1916 Migratory Birds Convention:  
Convention Between the United States and Great Britain for the Protection of Migratory Birds, 16  
August 1916, 39 US Stat 1702, TIAS No 628 (entered into force 7 December 1916) [Convention]).  
Page: 176  
Canada implemented an amended Convention, the Convention for the Protection of Migratory  
Birds in the United States and Canada, 14 December 1995, (entered into force 8 October 1999)  
Can TS 1999 No 34 [Amended Convention], through the Migratory Birds Convention Act, 1994,  
SC 1994, c 22 (MBCA).  
[629] Subsection 2(1) of the MBCA defines a “migratory bird” as a bird referred to in the  
Amended Convention as set out in the Schedule of the MBCA, and includes sperm, eggs, embryos,  
tissue cultures, and parts of the bird. The MBCA was enacted to implement the Amended  
Convention by protecting migratory birds and nests.  
[630] Section 7(1)(a)(iii) of the IAA is properly anchored in Parliament’s authority to legislate  
for the protection of migratory birds as ancillary to the implementation of an Imperial treaty under  
s 132 of the Constitution Act, 1867.  
iv.  
Section 7(1)(a)(iv) change to components of the  
environment within the legislative authority of  
Parliament: any other component of the environment set  
out in Schedule 3  
[631] Section 7(2) provides that the “Governor in Council may, by order, amend Schedule 3 or  
add or remove a component of the environment or a health, social or economic matter”. Schedule  
3 has not been amended, but in any event, s 7(1)(e) limits these components of the environment to  
“any change to a health, social or economic matter within the legislative authority of Parliament  
that is set out in Schedule 3” [emphasis added].  
v.  
Section 7(1)(b)(i) change to the environment on federal  
lands  
[632] “[F]ederal lands” are defined in s 2 of the IAA. They include lands that belong to Canada,  
and other identified lands and areas, as well as “reserves, surrendered lands and any other lands  
that are set apart for the use and benefit of a band and that are subject to the Indian Act”, and all  
waters on and airspace above those reserves or lands. Parliament’s jurisdiction to legislate with  
respect to environmental effects or changes to the environment on federal lands does not appear to  
be in dispute.  
vi.  
Section 7(1)(b)(ii) change to the environment in another  
province: POGG and s 91 of the Constitution Act, 1867  
[633] Section 7(1)(b)(ii) prohibits proponents of designated projects from doing anything to carry  
out those projects if doing so may cause changes to the environment in another province. This  
provision regulates a project’s extra-provincial environmental effects, something Canada has been  
assessing since CEAA, 1992: s 46(1). And again, while s 7 itself covers any change to the  
environment, the IAA is ultimately concerned with adverse effects to the environment in another  
province.  
Page: 177  
[634] These effects are the exclusive domain of Canada by virtue of the national concern doctrine  
under the POGG power. The Supreme Court of Canada has already confirmed that the problem of  
inter-provincial pollution is a matter of national concern for which Canada has jurisdiction to  
legislate: Interprovincial Co-operatives Ltd et al v R, [1976] 1 SCR 477 [Interprovincial Co-  
operatives]; R v Crown Zellerbach Canada Ltd, [1988] 1 SCR 401 at 445-446, per La Forest J (in  
dissent but not on this point) [Crown Zellerbach]; GGPPA SCC at para 99. As a majority of the  
Supreme Court recently noted in GGPPA SCC at para 195, “interprovincial pollution is  
constitutionally different from local pollution and may fall within federal jurisdiction on the  
basis of the national concern doctrine”.  
[635] That Canada must have jurisdiction to consider extra-provincial environmental effects is  
confirmed by Interprovincial Co-operatives. In that case, the province of Manitoba brought an  
action against two companies for damage caused in Manitoba from the release of mercury into  
rivers in Ontario and Saskatchewan. At issue was whether Manitoba had the authority to pass a  
statute creating liability for harm sustained from water pollution originating from other provinces,  
even where the pollution was given regulatory approval by those other provinces.  
[636] A majority of the Supreme Court held that Manitoba had no such authority, Pigeon J  
concluding that “in respect of injury caused by acts performed outside its territory, I cannot accede  
to the view that this can be treated as a matter within its legislative authority when those acts are  
done in another province” (516). Rather, the pollution of interprovincial waters must fall within  
federal jurisdiction (513-514) because the jurisdiction from which the interprovincial pollution  
originated (in this case, Ontario, and Saskatchewan) likewise lacks the regulatory authority to  
authorize such extra-provincial effects. As Pigeon J noted at 511, “it does not appear to me that a  
province can validly license on its territory operations having an injurious effect outside its  
borders”. It is this reality of provincial incapacity that explains the following remark by Laskin CJ  
at 499 (in dissent but not on this point): “if any regulatory authority to have interprovincial effect  
is to exist in respect of pollution of interprovincial waters it would have to be established under  
federal legislation” [emphasis added].  
[637] In short, jurisdiction to consider the extra-provincial environmental effects of a local  
project must fall to Canada because the province in which the effects are created lacks the  
jurisdiction to authorize them and the province in which the effects are felt lacks the jurisdiction  
to protect against them. POGG is a residual power that can only be engaged where the matter does  
not fall under any provincial head of power: GGPPA SCC at paras 89, 110, 141. That is certainly  
the case with respect to the extra-provincial environmental effects of local projects, as no province  
has the jurisdiction to consider them. This also explains why such effects are a matter of “national  
concern” specifically. The doctrine relies to a considerable extent on the concept of “provincial  
inability”, the idea that “federal jurisdiction should be found to exist only where the evidence  
establishes provincial inability to deal with the matter”: GGPPA SCC at paras 152, 164. Here  
provincial inability is patent and not reliant upon evidentiary considerations: provinces are simply  
constitutionally incapable of acting on the problem. Nor does anything in the reformulation of  
Page: 178  
“national concern” in GGPPA SCC detract from the conclusion that inter-provincial pollution is a  
matter of national concern.  
[638] Moreover, the power to address inter-provincial pollution must include the ability for  
Canada to limit and potentially prohibit the source of the pollution even though that source is an  
activity located within a province. This was specifically addressed in Crown Zellerbach at 445,  
where La Forest J (in dissent but not on this point) said this about the POGG power:  
In legislating under its general power for the control of pollution in areas of the  
ocean falling outside provincial jurisdiction, the federal Parliament is not confined  
to regulating activities taking place within those areas. It may take steps to prevent  
activities in a province, such as dumping substances in provincial waters that  
pollute or have the potential to pollute the sea outside the province. [Emphasis  
added]  
Accordingly, there is nothing inappropriate about the IAA seeking to prohibit, first temporarily and  
potentially permanently, extra-provincial effects emanating from a designated activity located in  
a particular province. Canada has the constitutional authority, if not the moral duty, to protect  
provinces and their residents from extra-provincial environmental harm that the province itself is  
constitutionally incapable of addressing. It should come as no surprise that Canada would seek to  
do so by focusing on the source of that harm.  
[639] Accordingly, s 7(1)(b)(ii) of the IAA is properly anchored in Parliament’s authority to  
legislate for the “Peace, Order, and good Government of Canada” under s 91 of the Constitution  
Act, 1867, inter-provincial harm to the environment being a matter of national concern.  
vii.  
Section 7(1)(b)(iii) change to the environment outside  
Canada: POGG and s 91 of the Constitution Act, 1867  
[640] Parliament likewise has legislative authority over environmental effects that occur outside  
Canada under s 7(1)(b)(iii) of the IAA. The reason is much the same as with extra-provincial  
effects: authority must fall to Canada as a residual power under POGG because provinces have no  
legislative jurisdiction beyond their own borders.  
[641] This is evidenced in Reference re Newfoundland Continental Shelf, [1984] 1 SCR 86, 5  
DLR (4th) 385 [Newfoundland Continental Shelf cited to SCR], where the Supreme Court of  
Canada considered whether Canada or Newfoundland had legislative jurisdiction over natural  
resources on the continental shelf offshore Newfoundland. The Court had little difficulty deciding  
that legislative jurisdiction falls to Canada under the POGG power and that Newfoundland’s  
legislative competence, like that of all the other provinces, is confined to legislation operating  
within the provinces, a restriction found expressly in s 92(13) and s 92A(1) of the Constitution  
Act, 1867 (127-128).  
Page: 179  
[642] The significance of Newfoundland Continental Shelf in terms of Canada’s jurisdiction  
under POGG is not confined to the exploitation of natural resources offshore. La Forest J (in  
dissent but not on this point) relied on the case when he said the following about the POGG power  
in Crown Zellerbach at 445: I have no doubt that [Canada] may also, as an aspect of its  
international sovereignty, exercise legislative jurisdiction for the control of pollution beyond its  
borders” [emphasis added].  
viii. Section 7(1)(c)(i)-(iii) change to the environment of  
Indigenous Peoples, with impact on  
a)  
b)  
physical and cultural heritage.  
the current use of lands and resources for  
traditional purposes.  
c)  
any structure, site or thing that is of historical,  
archeological, paleontological, or architectural  
significance.  
and  
Section 7(1)(d) any change occurring in Canada to the  
health, social or economic conditions of the Indigenous  
peoples of Canada.  
[643] Section 7(1)(c) prohibits proponents of designated projects from doing anything to carry  
out the project that will cause a change to the environment of Indigenous peoples, where that  
change will have an impact on physical and cultural heritage, use of lands and resources for  
traditional purposes, or structures or sites of historical, archaeological, paleontological, or  
architectural significance. Section 7(1)(d) prohibits activity that will cause a change in Canada to  
the “health, social or economic conditions” of Indigenous peoples.  
[644] Pursuant to s 91(24), Canada has exclusive authority to make laws in relation to “Indians,  
and Lands reserved for the Indians”. Much has been written about the reason for reserving  
legislation in relation to these subjects exclusively to the federal government. One explanation is  
that it was considered that “Indians and their lands required the protection of a centralized authority  
from the adverse interests of local settlers”.226 The Supreme Court of Canada in Daniels v Canada  
(Indian Affairs and Northern Development), 2016 SCC 12 at para 25, [2016] 1 SCR 99 described  
the purpose of s 91(24) as supporting the expansionist goals of Confederation, including the  
226  
Kerry Wilkins, “Life Among the Ruins: Section 91(24) after Tsilhqot’in and Grassy Narrows” (2017) 55:1 Alta  
L Rev 91 at 97; see also Hogg at § 28:1.  
Page: 180  
building of a national railway, which required a relationship between the federal government and  
Aboriginal groups.  
[645] Like other federal effects defined in the IAA, the provisions in ss 7(1)(c) and (d) are not  
new additions to federal environmental legislation. They largely track the language of s 5(1)(c) of  
CEAA, 2012.  
[646] The validity of s 5(1)(c) of CEAA, 2012 was challenged in Taseko Mines Limited v Canada  
(Environment), 2017 FC 1100 [Taseko Mines], where it was argued that the effect of the provision  
was to render provincial approval of a project inoperative if there was an effect on Aboriginal  
peoples. The Federal Court dismissed the judicial review application on other grounds and did not  
find it necessary to address the constitutionality of the provision. However, in obiter, Phelan J  
stated that he would have found it to be intra vires the federal government, noting that the purpose  
clause of CEAA, 2012 speaks to the “promotion of communication and cooperation with  
[A]boriginal people”, that the legislature recognized the environmental assessment process is  
designed to satisfy the Crown’s duty to consult, and that the language of s 5(1)(c) is intended to  
draw out the impacts to be considered: paras 150-151. He found that the pith and substance of the  
provision comes within “Parliament’s power to legislate for ‘Indians, and Lands Reserved for the  
Indians’ in s 91(24)”: para 152. These same considerations are true of the current ss 7(1)(c) and  
(d) of the IAA.  
[647] Relevant to the effects on Indigenous peoples described by ss 7(1)(c) and (d) is the Crown’s  
duty to consult, an obligation imposed as part of the constitutional principle of the honour of the  
Crown: Mikisew Cree First Nation v Canada (Governor General in Council), 2018 SCC 40 at  
paras 24-27, [2018] 2 SCR 765 [Mikisew Cree]. The duty to consult arises where “the Crown  
contemplates executive action that may adversely affect s 35 rights” and has also been applied in  
the “context of statutory decision makers that ... act on behalf of the Crown”: Mikisew Cree at  
para 25. The decision of whether to approve a project that has the potential to adversely affect  
Aboriginal rights gives rise to a duty to consult: Taku River Tlingit First Nation v British Columbia  
(Project Assessment Director), 2004 SCC 74 at paras 27-28, [2004] 3 SCR 550 [Taku River]. The  
obligation is owed by both levels of government (Grassy Narrows First Nation v Ontario (Natural  
Resources), 2014 SCC 48 at para 50, [2014] 2 SCR 447 [Grassy Narrows]) and, depending on the  
circumstances, may be owed by both levels of government at once.  
[648] The duty may be met where the affected Indigenous group participates in an environmental  
assessment process related to the project, as was the case in Taku River. In that case, the relevant  
assessment process, under British Columbia’s Environmental Assessment Act, included  
participation by the affected Aboriginal groups, the provincial government, and the federal  
government, and was adequate to satisfy the Crown’s duty to consult: paras 39-41. The role of  
environmental assessment and regulatory processes in satisfying the Crown’s constitutional  
obligations to Indigenous peoples was also discussed in Clyde River (Hamlet) v Petroleum Geo-  
Services Inc, 2017 SCC 40 at paras 30-34, [2017] 1 SCR 1069, where the Supreme Court of Canada  
Page: 181  
found the procedures of the National Energy Board could be relied upon by the Crown “to  
completely or partially fulfill its duty to consult”: para 34.  
[649] Like environmental assessment generally, this is an area where cooperative federalism can  
and should be encouraged. The purposes of the IAA include promoting communication and  
cooperation with Indigenous peoples in the impact assessment process (s 6(1)(f)) and ensuring  
respect for the s 35 rights of Indigenous peoples in the course of the assessment process (s 6(1)(g)).  
The provisions of the IAA that contemplate involvement of Indigenous groups and facilitate  
information gathering to identify effects on Indigenous peoples and their lands are in keeping with  
the stated purposes of the legislation and facilitate the federal government’s duty to consult. In  
Taseko Mines, the Federal Court was of the view that a purpose of s 5(1)(c) of CEAA, 2012 was to  
garner information for the environmental assessment process, in furtherance of the Crown’s duty  
to consult. I agree, and the same can be said of the equivalent provisions of the IAA.  
[650] In addition, the consultation and cooperation provisions of the IAA can apply to ensure the  
sharing of information among jurisdictions where a project is subject to both the federal regime  
and another jurisdiction’s environmental assessment regime, and where constitutional obligations  
are owed by both levels of government.  
[651] The duty to consult aside, no one has offered a serious articulation as to why the interests  
protected in ss 7(1)(c) and (d) of the IAA somehow fall outside the scope of “Indians, and Lands  
reserved for the Indians”. It may be true that these interests fall outside the “core” of s 91(24) such  
that interjurisdictional immunity does not prevent provincial legislation of general application  
from authorizing projects which impact upon them and ultimately infringe Aboriginal and treaty  
rights under s 35 of the Constitution Act, 1982: see Grassy Narrows; Tsilhqot’in Nation v British  
Columbia, 2014 SCC 44, [2014] 2 SCR 256. However, the applicability of provincial legislation  
to Indigenous peoples says nothing about the validity of federal legislation like the IAA. A local  
project authorized by a provincial legislative regime can nonetheless have adverse effects on  
Indigenous interests, where those effects are understood as effects within federal jurisdiction.  
[652] A case in point is the circumstances in Oldman River, which Hogg describes this way: “The  
dam on the Oldman River had an effect on navigable waters, fisheries and lands reserved for the  
Indians (there was an Indian reserve downstream from the dam site). These effects justified a wide-  
ranging environmental assessment encompassing the impact of the dam on those three subject  
matters as well as any other federal matters that turned out to be implicated” (§30:32). It was in  
this context that Hogg ultimately characterized the decision in these terms: “The effect of the  
Oldman River decision is to confer on the federal Parliament the power to provide for  
environmental impact assessment of any project that has any effect on any matter within federal  
jurisdiction” (ibid). In other words, adverse effects on Indigenous peoples from a local project are  
said to constitute effects within federal jurisdiction.  
[653] A particularly compelling image is painted in an Alberta case, Fort McKay First Nation v  
Prosper Petroleum Ltd, 2020 ABCA 163, of what may be at stake for First Nations peoples when  
Page: 182  
resource development encroaches on their traditional lands. In 2013, Prosper Petroleum sought  
authorization from the Alberta Energy Regulator to construct a bitumen recovery project that  
would produce 10,000 barrels a day. This oil extraction plant would be 5 kilometers from the First  
Nations border, adjacent to an area used as traditional fishing and hunting lands. In the land use  
planning process under municipal authority, in 2003 Alberta had promised to preserve a buffer  
zone to protect these traditional lands. Nonetheless, under the predecessor to the current EPEA,  
the Alberta Energy Regulator granted approval to Prosper Petroleum to build its oil extraction  
facility next to the traditional lands. Due to the extensive industrial and resource development  
surrounding Fort McKay First Nation, the Nation was concerned about the ability of its members  
to pursue their traditional way of life in their community which had been “the most severely  
affected of all First Nations by oil sands development in the region”: para 6.  
[654] This is the kind of situation where ss 7(1)(c) and (d) might apply: the “designated project…  
may cause effects…with respect to Indigenous peoples” … “resulting from any change to the  
environment” on “cultural heritage” … “use of lands and resources for traditional purposes” …or  
“any change … to the health, social or economic conditions of the Indigenous peoples of Canada”.  
[655] For such circumstances, the IAA contemplates a multilateral process that would involve the  
Agency, Indigenous groups, provincial, and even regional jurisdictions, in a process to determine  
what is in the public interest. There can be little doubt that environmental effects from such a  
project and there are environmental effects from bitumen recovery projects would impact the  
neighbouring First Nation’s environment, broadly construed, and that these effects are directly  
linked to a matter within federal jurisdiction: “Indians, and Land reserved for the Indians” under s  
91(24) of the Constitution Act, 1867. Paragraphs 7(1)(c) and (d) provide Indigenous peoples with  
a way to assert their constitutional and other rights and interests, whether to protect traditional  
homelands for pursuit of cultural interests or for advancement of economic interests.  
ix.  
Section 7(4) the proponent may cause a change referred  
to in s 7(1)(d) in relation to Indigenous peoples that hold  
rights affirmed by s 35 of the Constitution Act, 1982 if the  
change is not adverse and the Indigenous peoples and  
proponent agree the act or thing may be done.  
[656] Section 7(4) allows for a proponent of a designated project to carry out an activity that may  
cause a change in relation to an Indigenous group that holds rights affirmed by s 35 of the  
Constitution Act, 1982 if the change is not adverse and the council authorized to act on behalf  
of the Indigenous group, community or people and the proponent have agreed that the act or thing  
may be done. Canada cites s 7(4) as an example of cooperation and consultation with Indigenous  
peoples.  
[657] Where this provision is engaged, a question may arise as to whether an anticipated change  
is “adverse”, and whether Indigenous groups have the autonomy to consent to “effects” that are  
adverse”. Decisions made under the IAA environmental assessment regime ultimately balance  
Page: 183  
positive and negative effects to determine whether a project is in the public interest. The same  
approach might apply to a decision on a project where s 7(4) is engaged; an agreement by an  
Indigenous group to develop resources might weigh in the balance whether the effects are adverse.  
But when and whether a project that engages s 7(4) will be approved cannot be decided in the  
abstract; and in any event, the s 7(4) language reflects a federal policy choice rather than a  
constitutional conundrum.  
d.  
Section 8: Federal Decisions  
[658] Section 8 of the IAA prohibits a federal authority from exercising any power or performing  
any duty or function that permits a designated project to be carried out, and from providing  
financial assistance, unless the Agency decides that no impact assessment is necessary, or the  
project is approved following an impact assessment. This provision applies to federal decisions  
external to the operation of the IAA, as the Court found to be within the constitutional power of  
the federal authority in Oldman River.  
e.  
Sections 81-83: Federal Projects on Federal Lands and Projects  
Outside Canada  
[659] Similarly, federal projects carried out on federal lands and outside Canada (IAA, ss 81-83)  
are indisputably within federal constitutional authority. These provisions mirror s 6 of Guidelines  
Order, found to be within federal constitutional authority in Oldman River.  
f.  
Sections 32-33 of the Regulation Schedule: GHG Emissions may  
be “Effects” in Federal Jurisdiction; and Identify Threshold  
Levels for Project Inclusion on the Project List  
[660] Alberta suggests that if “the production of GHG emissions or the potential for accidental  
spills are sufficient from a constitutional perspective to support impact assessment … then the  
potential application of the IAA becomes virtually limitless” (Alberta’s Factum at para 81). This is  
the extent to which Alberta challenges the reference to GHG emissions in ss 32-33 of the  
Regulation Schedule.  
[661] GHG emissions is not itself a federal trigger under s 7 of the IAA (or anywhere else).  
Indeed, Canada explicitly declined to adopt a proposal from certain Indigenous groups  
which [r]ecommended a greenhouse gas emissions trigger that designates a project where project-  
related GHG emissions may affect Canada’s ability to meet its international commitments to  
reduce GHG emissions”: RIAS at 5671. Accordingly, neither the IAA nor the Regulation assert  
GHG emissions are a matter of federal jurisdiction in the way that effects on fish or Indigenous  
peoples are said to be matters of federal jurisdiction. There is no language in the IAA claiming  
federal jurisdiction to assess a provincialproject anytime that project emits GHGs. If that were  
true, essentially every project would be subjected to a federal assessment (which is not the case)  
and there would be no need for a screeningdecision in s 16 of the IAA.  
Page: 184  
[662] Section 32 of the Regulation Schedule applies to the:  
construction, operation, decommissioning and abandonment of a new in situ  
oilsands extraction facility that has a bitumen production capacity of 2 000 m3/day  
or more and that is  
(a) not within a province in which provincial legislation is in force to limit the  
amount of greenhouse gas emissions produced by oil sands sites in the province; or  
(b) within a province in which provincial legislation is in force to limit the amount  
of greenhouse gas emissions produced by oil sands sites in the province and that  
limit has been reached.  
Section 33 of the Regulation Schedule says the same with respect to the “expansion of an existing  
in situ oil sands extraction facility, if the expansion would result in an increase in bitumen  
production capacity of 50% or more and a total bitumen production capacity of 2 000 m3/day or  
more”.  
[663] Section 7(1)(b) of the IAA operates in conjunction with ss 32 and 33 of the Regulation  
Schedule and the screening decision in s 16 of the IAA to trigger a federal assessment of certain in  
situ oil sands extraction facility projects if carrying out such a project may cause adverse effects  
to the environment on, for example, federal or First Nations lands, in another province, or outside  
of Canada. In my view, the reference to GHG emissions in these sections demarcates a threshold  
for particular in situ projects to be placed on the Project List to trigger s 7 of the IAA, just as certain  
capacity thresholds identify other projects in the Project List; and just as certain thresholds of  
activity identified projects for the Project List under CEAA, 2012, as discussed in Part II above.  
[664] It was important in GGPPA SCC that the matter of GHG emissions generally was not a  
matter of national concernbecause of the mechanics of the POGG power: once something is a  
matter of national concern, the provinces are precluded from legislating on that matter. Clearly,  
provinces have the jurisdiction to legislate on GHG emissions. Indeed, something can only be a  
matter of national concern if provinces lack the jurisdiction to deal with it. Accordingly, a narrow  
aspect of GHG emissions was carved out for purposes of POGG, namely “establishing minimum  
national standards of GHG price stringency to reduce GHG emissions”: GGPPA SCC at para 207.  
[665] First, the emission of GHGs from certain very large projects could in principle have  
adverse effects outside Canada or outside the province in question, thus triggering a federal  
assessment under s 7(1)(b)(ii)-(iii). However, if that were the case (a question of fact and evidence  
beyond the scope of this Reference), the jurisdiction would not be based on GHGs generally it  
would be based on whatever the extra-provincial effects happened to be, something that Canada  
must have jurisdiction over under POGG because, as noted, individual provinces lack the  
jurisdiction to regulate them. The nature of the substance causing the extra-provincial effect  
is irrelevant. Moreover, the extra-provincial effect triggers are longstanding and are best illustrated  
by concern not with GHGs or climate change but with rivers running between provinces or  
Page: 185  
between Canada and the United States. Indeed, federal assessments over inter-provincial rivers  
date back to EARPGO: see for example Can. Wildlife Fed. Inc. v Can. (Min. of the Environment),  
[1989] 4 WWR 526 (FC) at 540, [1989] 3 FC 309:  
I agree that unwarranted duplication should be avoided but it seems to me that a  
number of federal concerns were not dealt with by the provincial environment  
impact statement, including a review of the impact of the project in North Dakota  
and Manitoba. As such, I do not think that applying the EARP Guidelines Order  
would result in unwarranted duplication but would fill in necessary information  
gaps.  
[666] Second, GHG emissions and climate change are constitutionally permissible factors in  
decision-making to the extent they are relevant or rationally connected to valid federal triggers. As  
noted by author Martin Z Olszynski, “[s]o long as the pith and substanceof the legislation falls  
within the scope of a federal head of power, and the factors considered by the decision-maker are  
relevant, or rationally connected, to his or her decision, then decision-making pursuant to that  
legislation will be constitutional”.227 This raises the distinction between legislating on a matter and  
making decisions under that legislation, discussed in more detail under heading V.B.2.i.i. herein.  
Clearly, the factors that a decision-maker can take into account are broader than the subject matter  
which triggered the jurisdiction to make the decision. A federal Minister who has jurisdiction to  
consider whether a projects harm to fish is in the public interest is not limited to fish-related”  
considerations, otherwise approvals would rarely, if ever, be granted because adverse effects will  
rarely, if ever, be beneficial to fisheries. The decision-maker must be able to consider outside  
benefits to counterbalance the harm, including, for example, economic benefits in the form of jobs  
and revenue to the local economy. However, once this is accepted, the question becomes how far  
a decision-maker can go to develop a complete economic picture.  
[667] Take sustainability, for example, a factor in s 63 of the IAA to be considered when  
determining whether adverse federal effectsare in the public interestunder s 60. Sustainability  
is defined in the IAA as the ability to protect the environment, contribute to the social and  
economic well-being of the people of Canada and preserve their health in a manner that benefits  
present and future generations”: s 2. Carbon pollution is relevant to sustainability for all sorts of  
reasons, including economic reasons. For example, it has recently been suggested that federal  
assessments under the IAA consider the social cost of carbon, the dollar figure representing the  
estimated cost of damages that result from an additional ton of carbon dioxide (CO2) emitted into  
the atmosphere”.228 The idea is that carbon pollution is not only an obstacle to our continued  
227  
Martin Z Olszynski, “Reconsidering Red Chris: Federal Environmental Decision-Making after Miningwatch  
Canada v Canada (Fisheries and Oceans)” in The Honourable Mr. Justice William A Tilleman and Alastair R Lucas,  
Q.C., eds, Litigating Canada’s Environment: Leading Canadian Environmental Cases By the Lawyers Involved  
(Toronto: Thomson Reuters, 2017) 267 [Reconsidering Red Chris] at 271.  
228  
David V Wright & Meinhard Doelle, “Social Cost of Carbon in Environmental Impact Assessment” (2019) 52:3  
UBC L Rev 1007 at 1020.  
Page: 186  
survival as a species (no small matter) it is also really expensive. It creates financial costs that  
ultimately must be borne by all of us, regardless of where the emissions originate.  
[668] Accordingly, when one is determining the economic benefit of a project, some  
consideration of GHG emissions as part of the metric creates a richer picture by internalizing what  
would otherwise be an economic externality. As noted by authors Martin Z Olszynski & Marie-  
Ann Bowden:  
[T]here seems to be little room for doubt that the federal government weighs what  
can be considered conventional economic benefits of resource projects in its  
decision-making even seemingly local ones. If this is the case, the only change  
brought about by the CEAA is to broaden the federal government’s previously  
narrow metric for measuring benefits by reference to jobs and revenue, for  
example with the concept of sustainable development, which necessitates the  
incorporation of environmental costs and benefits into the equation.229 [emphasis  
added]  
[669] Indeed, it would be ironic if a federal decision-maker were allowed to consider a primarily  
local concern like jobs createdas part of the public interestdetermination but not economic  
considerations like the cost of carbon which transcend local concerns into the realm of the national.  
[670] In summary, if a designated project, even in the natural resources sector, may produce  
GHGs with effects in federal jurisdiction, then it is properly subject to the IAA just as is any other  
designated project on the Project List that may have effects extra-provincially or beyond the  
borders of Canada. However, there is no evidence in this Reference to consider to what extent an  
in situ oil sands extraction facility produces GHGs, and whether GHGs emitted from any particular  
in situ project may cause effects that change the environment on federal lands, in another province,  
or outside Canada. This issue remains for another day. In any event, ss 32-33 of the Regulation  
Schedule simply identify a threshold required to put particular in situ projects on the Project List  
so as to trigger s 7 of the IAA. The references to GHG emissions on the Project List would seem  
to be a red herring or irrelevant to whether federal regulation of such designated projects’ effects  
on areas of federal jurisdiction is constitutional.  
g.  
Project-Based Assessment: An External Legislative Trigger  
(Affirmative Regulatory Duty) tied to a Specific Head of Power  
is not a Constitutional Prerequisite  
[671] Alberta argues that EARPGO and CEAA, 1992 expressly relied on a federal ground of  
jurisdiction with an “affirmative regulatory duty” to trigger the federal regime, as in Oldman River,  
for example, the need for an authorization under the Navigable Waters Protection Act for a project  
that was otherwise regulated entirely by a province. The federal assessment power was tethered to  
229  
Marie-Ann Bowden & Martin Z P Olszynski, “Old Puzzle, New Pieces: Red Chris and Vanadium and the Future  
of Federal Environmental Assessment” (2011) 89 Can Bar Rev 445 [Bowden & Olszynski] at 484.  
Page: 187  
an affirmative regulatory duty under a federal head of power. On the other hand, goes the  
argument, the IAA does not contain a federal trigger and instead relies on a list of designated  
projects in the Project List that become prima facie subject to federal assessment, such as the  
potential for accidental oil spills, so that the reach of the IAA “becomes virtually limitless”:  
Alberta’s Factum at para 81. The majority agrees.  
[672] However, the federal government is not confined in its approach to environmental  
assessment, so long as it stays within its constitutional lane. The project-based approach in the IAA  
(and which likewise existed in CEAA, 2012) contains multiple safeguards to ensure that federal  
assessments remain focused on effects within federal jurisdiction. First, the trigger in s 7 limits its  
application to effects within federal jurisdiction, as previously outlined. Second, designated  
projects on the Project List are chosen based on their likelihood of causing effects within federal  
jurisdiction. And third, that a project is on the Project List does not necessarily mean an assessment  
will even occur. The screening decision in s 16 is designed to weed out individual designated  
projects not thought to have effects on federal jurisdiction, thereby addressing the concern that if  
triggers are not tied to an independent federal permit or authorization, then projects may be  
subjected to a federal assessment even if they do not ultimately have any adverse effects on federal  
jurisdiction.  
[673] In addition, while s 7 has the effect of tying up projects before a screening decision is made,  
the focus is still that of determining whether a project has federal effects. The benefit of this kind  
of “anticipatory” approach is that it clarifies early in the life of a project whether a federal  
authorization is required or not. Under the prior “decision-based” framework, a proponent might  
get years into a project before realizing that it required a federal license or permit. Often it is not  
known in advance whether a project will have adverse federal effects or the magnitude of those  
effects indeed, the fact of imperfect knowledge is the whole reason why assessment regimes  
exist in the first place. Given the centrality of the “precautionary principle” in modern  
environmental law, it is understandable that Parliament would want to focus on potential harm in  
areas of federal jurisdiction. Certain groups may not like this approach as a matter of policy, but  
that does not mean it is a problem constitutionally. Parliament is under no obligation to structure  
its environmental laws in ways that developers find optimal. Intervenors siding with Alberta  
expressed concerns and highlighted aspects of the law they found problematic. However, the  
efficacy of a law is not the concern of the courts in a division of powers analysis: Reference re  
Firearms Act (Can), 2000 SCC 31 at para 18, [2000] 1 SCR 783 [Firearms Reference].  
[674] Moreover, and in any event, jurisprudence subsequent to Oldman River has confirmed  
that the affirmative regulatory dutyconcept applied only to the EARPGO and did not establish  
Page: 188  
any kind of constitutional limit on the triggering of federal environmental assessment.230 Cited  
for this proposition is Moses (sometimes called Vanadium).231  
[675] In Moses, as previously discussed, a proponent wanted to develop a mine in Quebec. One  
of the issues was the applicability of CEAA, 1992. Canada’s position was that a federal assessment  
was required because the mine would impact fish, requiring an authorization from the Minister of  
Fisheries under s 35(2) of the Fisheries Act. Quebec’s position was that no federal assessment was  
required because there was not a valid trigger notwithstanding that s 35(2) was clearly one of the  
triggers listed in the Law List Regulations pursuant to s 59(f) of CEAA, 1992. Quebec argued that  
the affirmative regulatory dutydescribed in Oldman River was a constitutional imperative and  
was lacking here. (In Oldman River at 49, only the decision of the Minister of Transport under the  
Navigable Waters Protection Act was said to constitute an affirmative regulatory duty” – the  
decision of the Minister under the Fisheries Act was merely an ad hoc legislative power).  
[676] Canada argued that CEAA, 1992 had overtaken Oldman River on this point, such that  
authorization under the Fisheries Act was now a valid trigger, a position Quebec said ignores the  
sharing of powers under the Constitution Act, 1867 and enables federal environmental legislation  
to be used as a Trojan horse to invade provincial jurisdiction: 2008 QCCA 741 at para 68  
[emphasis added]. The Quebec Court of Appeal rejected Quebec's argument, finding that CEAA,  
1992 applied. The majority of the Supreme Court of Canada agreed, rejecting Quebecs argument  
that it would be unconstitutional for the federal Fisheries Minister to refuse to grant the necessary  
permits under s 35(2) of the Fisheries Act without first complying with CEAA, 1992: 2010 SCC  
17 at para 13. The Court went on to state that both federal and provincial assessment laws should  
be allowed to operate within its assigned field of jurisdiction”: Ibid. This was so notwithstanding  
Quebec's claim that the mine should be regulated only provincially because it falls under s 92A  
(para 36):  
There is no doubt that a vanadium mining project, considered in isolation, falls  
within provincial jurisdiction under s. 92A of the Constitution Act, 1867 over  
natural resources. There is also no doubt that ordinarily a mining project anywhere  
in Canada that puts at risk fish habitat could not proceed without a permit from the  
federal Fisheries Minister, which he or she could not issue except after compliance  
with the CEAA. The mining of non-renewable mineral resources aspect falls within  
provincial jurisdiction, but the fisheries aspect is federal" [emphasis added].  
[677] It is true that the triggering mechanism in CEAA, 1992 is still much closer to EARPGO  
than the trigger in CEAA, 2012 and the IAA. In CEAA, 1992, a federal assessment of a project  
(or an aspect thereof) was triggered by that project needing some sort of permit or the federal  
230  
Martin Z Olszynski, “Impact Assessment” in William A Tilleman et al, eds, Environmental Law and Policy, 4th  
ed (Toronto: Emond Montgomery Publications, 2020) 453 [Olszynski] at 462-463; see also Bowden & Olszynski at  
472-474.  
231  
The decision is described in Bowden & Olszynski at 445-446, 460-462, 465-466.  
Page: 189  
government making some sort of decision (though federal assessments were permitted in other  
cases, including with respect to projects having extra-provincial effects). In CEAA, 2012 and the  
IAA, the potential for an assessment is triggered (subject to being screened out) if the project is  
on the Project List. But while all of this may be true, it is not clear why it is important at least  
from a constitutional perspective. If Canada indeed has the authority to assess any project that  
has any effect on any matter within federal jurisdiction, as Hogg states (§ 30:32), then the focus  
on a Project List of major projectsin CEAA, 2012 and in the IAA appears to be essentially a  
policy choice designed to put different limits on how Canada will exercise that authority.  
[678] Choices must be made (and accordingly limits put in place) in terms of which projects may  
(potentially) be assessed. In EARPGO and CEAA, 1992, the limit generally (but not exclusively)  
came in the form of projects requiring a separate authorization. At first blush, the move to a  
major Project List may be seen as expanding the number of projects over which Canada has some  
sort of involvement. However, the move to such a list under CEAA, 2012 coincided with  
Parliament having drastically reduced the scope of Canada's Fisheries Act, and the protections  
for fish habitat in particularas well as amending the Navigable Waters Protection Act to apply  
to only a fraction of the water bodies that were subject to the pre-2012 regime: Olszynski at 467.  
Accordingly, had the pre-2012 trigger remained the same, there would have been fewer federal  
assessments since there were fewer projects requiring federal decisions. Moreover, since the  
trigger post-2012 is limited to a handful of matters (e.g., fish, migratory birds, but excluding pre-  
2012 matters like navigable waters), the number of projects undergoing federal assessment has  
been reduced from around 3000 per year to around 70 per year: ibid.  
[679] The reason Parliament might have moved away from the “decision-based” triggers in s 5  
of CEAA, 1992 (at least in part) is explained by authors Meinhard Doelle & Chris Tollefson in  
Environmental Law: Cases and Materials, 3rd ed (Toronto: Thomson Reuters, 2019) [Doelle &  
Tollefson] at 599:  
The requirements of section 5 created practical difficulties in cases where it was  
unclear for one reason or another whether a section 5 decision would be required.  
For example, section 35 of the Fisheries Act, R.S.C. 1985, c. F-14, required an  
approval in cases of harmful alteration of fish habitat. Whether a project would  
cause a sufficient alteration of fish habitat may not be known for certain until the  
late design stages of the project, much later than an EA process should ideally be  
initiated.  
[680] The majority suggests Canada only has the constitutional jurisdiction to assess a local  
project even where that project is not disputed to have effects on areas of federal jurisdiction –  
if federal legislative decision-making authority exists independent of the assessment process. I  
disagree. In my view, this confuses the jurisdiction Parliament has been granted under the  
Constitution Act, 1867 with how it chooses to exercise that jurisdiction. That Parliament has not  
chosen to exercise its full legislative power over fisheries in external legislation under the Fisheries  
Page: 190  
Act does not mean it is precluded from doing so now in the IAA.232 Indeed, La Forest J was clear  
in Oldman River at 47 when discussing the application of EARPGO that federal decision-making  
responsibility in an external statute is by no means co-extensive with matters falling within federal  
jurisdiction.  
[681] Nor is such legislative decision-making authority (whether as an “affirmative regulatory  
duty” or otherwise) needed to ascertain whether a local project will have effects within federal  
jurisdiction. Again, a case in point is Oldman River itself. While a federal decision under the  
Navigable Waters Protection Act was found to have triggered the federal assessment given how  
EARPGO was structured, the Court had no trouble concluding that the assessment should include  
effects on federal matters for which Canada had no independent legislative decision-making  
authority. Noting that “the scope of assessment is not confined to the particular head of power  
under which the Government of Canada has a decision-making responsibility” (73), La Forest J  
directed a consideration of “the environmental implications on all areas of federal jurisdiction  
potentially affected” (ibid), including the environmental impact of the dam on “Indians and Indian  
lands” – notwithstanding that the project did not require that Canada make any decision external  
to EARPGO in relation to “Indians and Indian lands”.  
[682] I do not dispute that a federal assessment must be tied to a federal decision. Assessments  
are not done in the abstract or for no reason; they are done for the purpose of providing a decision-  
maker with the information needed to make an informed decision. However, Parliament can,  
within its constitutional limits, structure federal decision-making as it sees fit. That includes by  
protecting against adverse effects in federal jurisdiction through decisions in the assessment  
process itself rather than in external legislation, and by making decisions with respect to certain  
kinds of projects and not others. In the case of the IAA, that involves the “public interest” decision  
in ss 60 and 62 authorizing or not authorizing a proponent to proceed with a designated project  
found to have adverse effects in one or more areas of federal jurisdiction.  
[683] Were it otherwise and the majority correct, Canada would never have jurisdiction to, for  
example, assess a local project on the basis of its adverse environmental effects in another province  
effects not contemplated in external legislation but which have been included in federal  
assessment legislation since CEAA, 1992. Canadians might be surprised to learn that no level of  
government in this country has jurisdiction to address the environment effects in their province  
from mercury dumped in a river by a project located in another province.  
232  
As noted in Anna Johnston, “Federal Jurisdiction and the Impact Assessment Act: Trojan Horse or Rational  
Ecological Accounting?” in The Next Generation of Impact Assessment, Meinhard Doelle & A John Sinclair, eds  
(Toronto: Irwin Law, 2021) 97 [Johnston] at 111, “[f]ailure to have enacted the Fisheries Act would not have nullified  
the federal fisheries power, and Parliament would still have authority to assess projects based on potential impacts on  
fish”.  
Page: 191  
h.  
Review of all Aspects of a Project is Permitted  
[684] Nor is it constitutionally impermissible for the IAA to allow the Agency or a review panel  
to assess all the effects of a designated project, both positive and negative, and regardless of  
whether those effects fall within federal jurisdiction. Assessing the whole of a project is simply a  
means of obtaining as much information about the project as possible. This in turn allows for a  
more fulsome analysis of the factors used to determine whether adverse effects within federal  
jurisdiction are in the public interest. As elaborated upon below, the public interest determination  
requires a consideration of costs and benefits which themselves transcend purely “federal” matters,  
best achieved by an assessment process that does not attempt to limit its scope at an early stage.  
[685] The approach is also not new. It was considered and sanctioned by the Supreme Court of  
Canada under CEAA, 1992 in MiningWatch (sometimes called Red Chris). In that case, Red Chris  
Development Company sought to develop a copper and gold open pit mine and milling operation.  
Red Chris proceeded through the provincial environmental regulation process. The British  
Columbia Environmental Assessment Office released a positive environmental assessment  
certifying that the project was not likely to cause adverse environmental, heritage, social,  
economic, or health effects. Red Chris applied to the federal Department of Fisheries and Oceans  
as the dam required a tailings pond to store the mine’s effluent. Fisheries concluded that an  
environmental assessment was required and would be conducted by it on the basis that the project  
fell within the Comprehensive Study List Regulations, SOR/94-638 under CEAA, 1992. Fisheries  
decided to conduct a screening with narrow scope including the tailings pond rather than a  
comprehensive study, relying on steps completed by the provincial process, including public  
consultations. The Screening Report was issued to that effect and the project allowed to proceed.  
[686] MiningWatch, a public interest group, filed for judicial review based on a breach of the  
duty under CEAA, 1992 to conduct a comprehensive study and to consult the public. Rothstein J,  
writing for the Court, characterized CEAA, 1992 this way, at paras 1-2:  
The Canadian Environmental Assessment Act, S.C. 1992, c. 37 (“CEAAor  
Act), is a detailed set of procedures that federal authorities must follow before  
projects that may adversely affect the environment are permitted to proceed. The  
Act and its regulations provide for different levels of intensity with which  
environmental assessments are to be performed depending upon the nature of the  
project under scrutiny. In practice, the intensity with which an environmental  
assessment should be conducted determines the “track” on which the assessment  
proceeds, whether by screening, comprehensive study, mediation or review panel.  
The issue in this appeal is whether the environmental assessment track is  
determined by the project as proposed by a proponent or by the discretionary  
scoping decision of the federal authority. In my opinion, the Act and regulations  
require that the environmental assessment track be determined according to the  
project as proposed; it is generally not open to a federal authority to change that  
level [emphasis added].  
Page: 192  
[687] The Court rejected the idea that CEAA, 1992 allowed scoping to trigger, the practice of  
a federal Minister or responsible authoritylimiting the scope of a federal assessment to a  
narrow component of a proposed project thought to fall within federal jurisdiction rather than the  
scope of the project as proposed by the proponent. The idea of scoping to triggeroriginated in  
case law from the Federal Court of Appeal that was premised on constitutional concerns over the  
jurisdiction of federal assessments233, however the Supreme Court opted not to follow that law in  
interpreting the legislation: para 26.  
[688] The Court observed that responsible departmental authorities can and should minimize  
duplication by using the coordination mechanisms, encouraging federal and provincial  
governments to adopt mutually agreeable terms for coordinating environmental assessments, to  
reduce unnecessary, costly, and inefficient duplication. Cooperation and coordination were  
expressly recognized in CEAA, 1992: para 41. MiningWatch obtained a declaration as to the  
federal government’s obligation to conduct a full assessment under CEAA, 1992.  
[689] While MiningWatch was not a constitutional case, nonetheless the Supreme Court would  
have been alive to the constitutional issues when it concluded that for federal environmental  
assessment purposes under CEAA, 1992, a “project” will include the entire project as proposed.  
i.  
A Project in the Public Interest vs all Aspects of a Project in the  
Public Interest  
[690] While environmental assessment of the whole project may be within federal constitutional  
authority under the IAA and Regulation, the next inquiry concerns whether the IAA provisions for  
decision-making based on that assessment are within federal constitutional authority. Does the IAA  
purport to confer power on the Minister and Governor in Council to use the federal impact  
assessment regime to authorize or not authorize a project by determining whether the project as a  
whole is in the public interest without qualification (not solely by reference to its effects in federal  
jurisdiction), in a fashion that exceeds its constitutional authority?  
[691] The provision relevant to this question, s 60(1), is set out at para 509 above. In brief, after  
considering an impact assessment report for a designated project, the Minister or the Governor in  
Council must determine whether the adverse effects within federal jurisdiction and the direct or  
incidental effects detailed by the report are in the public interest: ss 60, 62.  
[692] Both the Minister and Governor in Council must base their decisions on the impact  
assessment report, the factors set out in s 63, and the extent to which they are in the public interest:  
see para 512 above. In brief, they include (a) the project’s contribution to sustainability, (b) the  
significance of the projects adverse effects within federal jurisdiction and its adverse direct or  
incidental effects, (c) appropriate mitigation measures, (d) the impact the designated project may  
have on any Indigenous group and their s 35 rights, and (e) the extent to which the designated  
233  
Bowden & Olszynski at 452-455.  
Page: 193  
project will help or hinder the federal government’s ability to meet its environmental obligations  
and climate change commitments.  
[693] If either decision-maker determines that the relevant effects are in the public interest, it  
must impose any condition it thinks appropriate. Following a decision that the designated project  
is in the public interest, the project may proceed.  
[694] The question is whether only the adverse effects within federal jurisdiction” must be in  
the public interest, or, as Alberta contends, the project as a whole must be in the public interest,  
because the factors to be considered are either i) themselves outside of federal jurisdiction or ii)  
sufficiently broad that the public interest determination extends beyond effects within federal  
jurisdiction.  
i.  
Consideration of broad factors in federal decision-  
making is constitutional  
[695] As noted, a distinction must be drawn between legislating on a matter and decision-making  
pursuant to that legislation. Canada relies on this distinction, and it has been considered in  
academic commentary,234 recently expressed in this way:  
... there is a distinction between legislating on a matter and making decisions under  
that legislation. So long as a statute is intra vires, La Forest J indicated that the  
considerations that may inform decision making under it are not restricted to the  
jurisdictional root anchoring that legislation.235  
[696] An example La Forest J gives in Oldman River at 69-70 is the Australian case, Murphyores  
Incorporated Pty. Ltd. v Commonwealth of Australia (1976), 136 CLR 1 (HC), which describes a  
Minister being able to make an export decision under his trade and commerce power that includes  
considerations which do not themselves relate to trade and commerce.  
[697] Environmental impacts, by their very broad and pervasive nature, require broad,  
multifactorial consideration. “Quite simply, the environment is all around us and as such must be  
part of what actuates many decisions of any moment”: Oldman River at 70.  
ii.  
Consideration of broad factors in federal decision-  
making does not mean the decision the public interest  
determination extends beyond effects within federal  
jurisdiction  
[698] It is important to bear in mind that the jurisdictional questions shift as one goes through the  
impact assessment process:  
234  
Reconsidering Red Chris at 272. See also La Forest J himself in Oldman River at 69.  
Johnston at 114.  
235  
Page: 194  
[W]e need to consider federal jurisdiction at three key stages: (1) in deciding  
whether to do an assessment; (2) in deciding the scope of an assessment, and (3) in  
the post-assessment decision-making processes. With respect to the decision to  
carry out a federal assessment, the process would need a trigger that gives careful  
consideration to the potential of a proposed activity to affect an area of federal  
jurisdiction. It seems clear that in principle, the federal government has the  
constitutional authority to carry out an assessment where a proposed activity has  
a realistic potential to affect an area of federal jurisdiction. With respect to the  
scope of the assessment, it seems unlikely in light of cases such as Oldman, Red  
Chris, and Syncrude that once a federal EA is triggered, courts would impose limits  
on its scope. And with respect to post-assessment decision-making, there is some  
uncertainty about the precise limits of federal jurisdiction, but it is clear that the  
results of the assessment need to lay a proper foundation for federal decision-  
making. If the assessment identifies clear impacts on areas of federal jurisdiction,  
there would be a solid basis for federal jurisdiction that implements an integrated  
approach to addressing the impacts identified.236 [emphasis added]  
[699] There is an important distinction between the impact assessment stage and the decision-  
making stage. Section 22(1)(a) allows a federal assessment to consider the changes to the  
environment or to health, social or economic conditions and the positive and negative  
consequences of these changes that are likely to be caused by the carrying out of the designated  
project[emphasis added]. However, this does not mean that the IAA sanctions a federal decision-  
maker deciding whether a project as a whole is in the public interest. It is important to note that  
s 22 sets out factors to consider at the impact assessment stage. At the impact assessment stage,  
the Agency is trying to obtain as much information about the project as possible.  
[700] However, the decision-making stage is different, and the relevant considerations are  
narrower (at least in terms of mandatory factors set out in the IAA) and centred upon whether the  
effects within federal jurisdiction are in the public interest (ss 60, 62, 63), though the decision-  
maker must also take the assessment report into account: ss 60, 63.  
[701] That is not to say that a federal Minister or the Governor in Council at the decision-making  
stage need necessarily only consider positiveeffects of the project (e.g., jobs created) to offset  
the adverse effects within federal jurisdiction (e.g., harm to fish). But it is possible for a federal  
decision-maker to consider certain factors like those in s 63 (e.g., sustainability) because they are  
relevant to adverse effects within federal jurisdictionwithout the “public interestdecision being  
merely the sum total of all the positive and negative aspects of the project. Negative effects of the  
project which are not themselves within federal jurisdiction may inform concepts like  
sustainability that are used to determine whether adverse federal effects are deemed to be  
acceptable in the circumstances. However, because one side of the ledger is always adverse federal  
236  
Jason MacLean, Meinhard Doelle & Chris Tollefson, “Polyjural and Polycentric Sustainability Assessment: A  
Once-In-A-Generation Law Reform Opportunity” (2016) 30 J Env L & Prac 3 [MacLean, Doelle & Tollefson] at 44-  
45.  
Page: 195  
effects, very minor adverse effects within federal jurisdiction are unlikely to outweigh  
countervailing considerations and a designated project will not be prohibited from proceeding  
merely because it has negative effects outside federal jurisdiction of which the Minister or  
Governor in Council may disapprove.  
[702] It is true that after compliance with the IAA regime, a local project such as a new in situ oil  
sands extraction facility could fail to obtain authorization because the environmental effects in  
federal jurisdiction are not in the public interest. However, that result does not mean the IAA regime  
is unconstitutional or has squeezed out the operation of the EPEA. There are three junctures at  
which the two processes may intersect substitution (s 31(1)), delegation (s 29) and joint review  
(s 39(1)) - under which the assessment processes address the adverse environmental effects in  
federal jurisdiction, and the project may be authorized. There is nothing in the IAA to suggest that  
the federal assessment regime is simply duplicating the provincial assessment process and thus  
occupying the entire field of environmental assessment so as to block resource development. As  
noted in GGPPA SCC at para 65, “[c]ourts should generally hesitate to attribute to Parliament an  
intention to occupy an entire field” [emphasis added].  
j.  
Materiality and the Incidental Effects Doctrine  
[703] The majority suggests that even if the effects of an intra-provincial designated project are  
linked to a federal head of power, federal jurisdiction is not engaged until the point at which the  
effects become “significant”. Significance being a kind of constitutional pre-requisite, the IAA is  
unconstitutional, at least in part, because it allows federal decision-makers to prohibit adverse  
effects within federal jurisdiction from taking place even if those effects do not attain this  
threshold.  
[704] The theory relies on the vernacular of the “incidental effects doctrine”, using the term  
“incidental” to mean that if a local project wholly within provincial legislative authority, such as  
an oil sands extraction facility, has only an “incidental” qua “insignificant” impact on a federal  
matter, such effects are constitutionally irrelevant, and cannot be subject to federal constitutional  
authority. As I understand this in practical terms: if a few Canada geese meet their death in the  
tailings pond of a mega oil sands project authorized under provincial legislation, Parliament lacks  
the constitutional authority to protect them by environmental regulation to the extent the project’s  
effects on geese are merely “incidental effects” of the province’s exercise of authority.  
[705] With respect, this use of the concept of “incidental effects” is misplaced. The majority  
seeks to equate insignificant effects with incidental effects and as a corollary, significant effects  
with non-incidental effects in hopes of creating a clean dividing line (significance) to determine  
when effects become constitutionally relevant. However, whether or not the effects of a project  
are “significant” says nothing about whether they are “incidental effects” for purposes of the  
division of powers. Indeed, from the point of view of valid provincial legislation, the effects of a  
provincially authorized project on federal heads of power will always be incidental effects,  
regardless of the degree of materiality or significance.  
Page: 196  
[706] The incidental effects doctrine provides that if an impugned law is in “pith and substance”  
within a head of power assigned to the enacting legislature, the fact that such law may have  
“incidental effects” on another head of power outside the jurisdiction of the enacting legislature is  
irrelevant for constitutional purposes: Hogg at §15:5; Paul v British Columbia (Forest Appeals  
Commission), 2003 SCC 55 at para 14, [2003] 2 SCR 585; Firearms Reference at para 49. It is  
crucial to parse these terms of art. In the constitutional context, the term “incidental effects” means  
“consequential effects”: Reference re Upper Churchill Water Rights Reversion Act, [1984] 1 SCR  
297 at 332. It also means effects which are “collateral and secondary to the mandate of the  
enacting legislature”: Canadian Western Bank v Alberta, 2007 SCC 22 at para 28, [2007] 2 SCR  
3, emphasis added [Canadian Western Bank].  
[707] Because “incidental effects” refer to consequences which are collateral or secondary to a  
law’s dominant purpose and effects, it does not necessarily speak to the magnitude of the effect on  
the head of power of the other level of government. Such effects can be minor in nature; however,  
they can equally constitute a “substantial impact” (Hogg at §15.5) or be of “significant practical  
importance” (Canadian Western Bank at para 28). Accordingly, when a provincial law authorizing  
a local project has effects in areas of federal jurisdiction (e.g., migratory birds), those effects will  
be “incidental” regardless of whether they are significant because they are collateral or secondary  
to the provincial law’s pith and substance.  
[708] If effects being “significant” were indeed synonymous with effects being more than merely  
incidental, and thus constitutionally relevant for purposes of triggering federal jurisdiction, on the  
majority view, federal assessments of local projects would only ever be triggered in instances  
where provincial legislation authorizing such projects was itself ultra vires. The point of incidental  
effects as a doctrine is to condone as proper and expected “incidental intrusions into matters subject  
to the other level of government’s authority” (Canadian Western Bank at para 28) without thereby  
rendering that law unconstitutional. Although the effects of a law may reveal its pith and substance,  
incidental or consequential or collateral effects “will not disturb the constitutionality of an  
otherwise intra vires law”: Global Securities Corp. v British Columbia (Securities Commission),  
2000 SCC 21 at para 23, [2000] 1 SCR 494. Once the effects of a provincial law on a federal head  
of power are no longer merely “incidental”, however, it becomes a law that in “pith and substance”  
relates to a federal subject matter and is invalid.  
[709] The incidental effects doctrine does not mean that merely “insignificant” effects – whether  
relative to the magnitude of the intra-provincial undertaking, or absolutely put such effects  
beyond the pale of Parliament’s legislative authority. Moreover, in my view, that incidental effects  
may be discounted in the constitutional analysis does not mean that the opposing constitutional  
authority must show that the impact is material vis-a-vis the magnitude of a project or activity, or  
in absolute terms. Public policy concerns militate against a high threshold to trigger protection  
under environmental legislation in any event. It is not for the courts to tell Parliament at what point  
it is allowed to be concerned about harm to the environment in areas within its constitutional  
jurisdiction.  
Page: 197  
k.  
IAA: Cooperative Federalism, not Federal Veto  
[710] Provincial environmental assessment regimes vary from province to province.237 The  
EPEA governs the regime in Alberta.238 Under the EPEA, regulations prescribe what types of  
activities require an environmental assessment.239 Not all projects are subject to an assessment.  
For example, a surface coal mine producing more than 45,000 tonnes per year would require an  
environmental assessment, but the drilling or operation of an oil or gas well would not.240  
[711] The IAA purposes are detailed above, but generally, the legislative purpose is to foster  
sustainability and to protect the environment and health, social, and economic conditions within  
Parliament’s legislative authority from adverse effects caused by designated projects. Some of the  
EPEA purposes are to protect the environment, support sustainable development, predict social,  
environmental, and economic consequences, and consult with stakeholders: EPEA, s 40.  
[712] The IAA employs an environmental impact assessment approach culminating in a report  
that sets out the effects that may be caused by the designated project and from among those effects,  
those that are adverse effects within federal jurisdiction: s 28(3).  
[713] The EPEA employs an environmental impact assessment approach culminating in an  
“environmental impact assessment report” that must describe the proposed activity and its various  
effects. The EPEA sets out 15 requirements for the report, including a description of the proposed  
activity, the need for the activity, as well as potential positive and negative environmental, social,  
economic, and cultural impacts: s 49.  
[714] The EPEA impact assessment report will be used for decision-making by the appropriate  
regulator (such as Alberta Environment and Parks, the Alberta Energy Regulator, or the Alberta  
Utilities Commission) to decide whether the activity is in the public interest.241  
[715] Alberta submits that its environmental assessment regime and the federal environmental  
regime cannot comfortably co-exist: a project could be subject to a rigorous and full assessment  
under the Alberta assessment regime, resulting in an approval, perhaps with significant conditions,  
but that provincial process could be entirely frustrated by an IAA review arriving at a different  
237  
Doelle & Tollefson at 594.  
238  
Affidavit of Corinne Kristensen (“Kristensen Affidavit”), Alberta Record, Vol 1, paras 13-17, A3-A4.  
239  
See Environmental Assessment (Mandatory and Exempted Activities) Regulation, AR 111/1993 [Activities  
Regulation]. The EA Director also has discretion to subject a proposed activity to an environmental assessment, see  
EPEA, s 44.  
240  
Activities Regulation, Schedules 1 & 2.  
241  
Kristensen Affidavit, Alberta Record, Vol 1, para 19, A5.  
Page: 198  
decision about the public interest, and withholding federal approval to proceed. This would  
constitute a significant displacementof the provincial regulating regime and impairment of  
provincial jurisdiction: Alberta’s Factum at para 129.  
[716] Alberta submits that environmental, social, economic, and Indigenous benefits and impacts  
are already addressed under its provincial regulatory regime which considers local and regional  
concerns arising from the exercise of exclusive provincial jurisdiction over resource management,  
provincial lands, and undertakings. Instead of being a planning tool in aid of federal decision-  
making, Alberta sees the IAA as broadly regulating all “effects” of a designated project allowing  
for a veto of projects that provincial review processes approve as in the public interest. In this way,  
Alberta submits the IAA is a Trojan horse- a “colourable device to invade areas of provincial  
jurisdiction which are unconnected to the relevant heads of federal power”: Ibid at para 132, citing  
Oldman River at 72.  
[717] It is true that a federal decision under the IAA can halt a project. But there are several  
problems with Alberta’s characterization of this federal role as a “veto”. It fails to recognize the  
legitimate role of the federal government in assessing projects that cause effects within federal  
jurisdiction, manifest in different ways: (1) a true interpretation of the IAA shows it has  
strengthened its control over adverse environmental effects in federal jurisdiction rather than  
sought to control outcomes of the federal and provincial processes; (2) federal and provincial  
decision-makers make different decisions, rather than one exercising a “veto” power; (3) the  
approach that a project cannot proceed as proposed without endorsement by both levels of  
government has been in place since at least Oldman River; and (4) both the IAA and EPEA are  
designed to facilitate cooperation between levels of government rather than one holding a veto”  
power over the other.  
i.  
IAA strengthens control over environmental effects in  
federal jurisdiction  
[718] Rather than adopting a “veto” approach, the IAA has carved out its areas of environmental  
concern in federal jurisdiction and focussed on controlling those effects. It is fair to observe that  
the federal government has strengthened its control over its own assessment process in the IAA.  
An example is the IAA’s elimination of the concept of equivalency. Under CEAA, 2012,  
equivalency allowed the federal government to exempt a project from the federal environmental  
assessment process if the project was undergoing an equivalent provincial assessment: s 37.242 This  
exemption meant there would be no federal decision with respect to the project. Under the IAA,  
even if a different jurisdiction carries out the impact assessment, it appears that there will always  
be a federal decision to approve or deny the project.243  
242  
Doelle & Tollefson at 609, 612.  
243  
Ibid at 618.  
Page: 199  
[719] Though the IAA allows the Minister to substitute a provincial process for impact  
assessment, the Minister still maintains certain controls over the assessment. Before approving a  
substitution, the Minister must be satisfied the provincial assessment meets certain criteria: ss 31,  
33. It must consider the same factors as a federal impact assessment, provide federal authorities  
with an opportunity to participate, allow for public consultation, and identify the adverse effects  
within federal jurisdiction: s 33. The Minister also has the power to seek additional information  
from a proponent or province after reviewing the report from a substituted assessment: s 35.  
[720] Though this may be increased federal oversight of provincial assessments, it is also a way  
for the Minister to ensure that the federal effects of a project are assessed in accordance with  
federal standards. The IAA deems that a substituted assessment is an impact assessment for the  
purposes of the IAA and satisfies all statutory and regulatory requirements: s 34. Since the federal  
government will use a substituted assessment to make its decision about whether the effects of the  
project within federal jurisdiction are in the public interest, it is reasonable for the federal  
government to ensure that its own environmental standards are met.  
ii.  
Federal and provincial decision-makers make different  
decisions, rather than a “veto” of one by the other  
[721] The concept of a vetosignifies one decision-maker over-ruling another with respect to a  
single decision. That is not the result here. Rather, the provincial and federal decision-makers are  
making different decisions (albeit with overlap). One is deciding whether effects within provincial  
jurisdiction are in the public interest, while the other is deciding whether effects within federal  
jurisdiction are in the public interest. These are distinct inquiries and decisions.  
iii.  
The approach that a project cannot proceed as proposed  
without endorsement by both levels of government has  
been in place since at least Oldman River  
[722] To the extent a vetosimply means that a given project cannot go ahead as proposed  
without both levels of government signing offon the project (assuming it engages federal  
jurisdiction), this has always been the case, certainly at least since Oldman River. In academic  
commentary on Oldman River, Steven Kennett describes the federal government as having a  
vetoover projects. 244 As discussed, Kennett then makes the case for federal-provincial  
cooperation in such circumstances.245  
iv.  
The IAA and EPEA are designed to facilitate cooperation  
rather than a competitive veto, one over the other  
244  
See Steven A Kennett, “Federal Environmental Jurisdiction After Oldman” (1993) 38:1 McGill L J 180 at 191 at  
200.  
245  
Ibid at 203.  
Page: 200  
[723] Both the IAA and EPEA are expressly designed to permit and encourage inter-jurisdictional  
cooperation in the conduct of assessments and sharing of information across agencies and  
governments. Both are drafted to work harmoniously to achieve these aims. Both recognize among  
their purposes, the importance of inter-jurisdictional cooperation: EPEA, s 2(h); IAA, s 6(1)(e).  
[724] Both statutes contain general provisions permitting the respective Minister to enter into  
agreements with the government or agency of another jurisdiction on various matters pertaining to  
environmental assessment: see EPEA, s 19; IAA, s 144(c)-(d). In practice, federal-provincial  
cooperation has existed between Canada’s and Alberta’s environmental assessment regimes for  
decades. An early agreement to coordinate through a bilateral agreement is the Canada-Alberta  
Accord for the Protection and Enhancement of Environmental Quality, OC 8775, (1975). Later  
came the 1993 Canada-Alberta Agreement for Environmental Assessment Cooperation, the most  
recent iteration of which was from 2005. It continues to be used by Canada and Alberta in  
establishing joint review panels. For instance, the recent Joint Review Panel decision regarding  
the Grassy Mountain Coal Project references the 2005 bilateral agreement in the agreement to  
establish the joint review panel.246 This project was reviewed under CEAA, 2012. The 2005  
bilateral agreement was signed when CEAA, 1992 was in force and yet it clearly continued to apply  
after CEAA, 1992 was replaced by CEAA, 2012. Nothing presented in this Reference suggests that  
the bilateral agreement does not apply now under the IAA.  
[725] Several provisions of the IAA are designed specifically to avoid duplication of effort in the  
assessment process. The Agency may delegate any part of an impact assessment and report  
preparation to another jurisdiction: s 29. The Minister may substitute the assessment process of  
another jurisdiction for the process under the IAA, upon request (s 31) and upon being satisfied of  
certain aspects of the process: s 33(2). Every federal authority in possession of expert information  
or knowledge with respect to a designated project must make that information available to a  
government or agency conducting a substituted assessment: s 23(c). Section 36 requires the  
Minister, when deciding whether to refer an impact assessment to a review panel, to consider  
opportunities for inter-jurisdictional cooperation: see also ss 21(1)(p), 92-93. Section 39 provides  
for the joint establishment of a review panel with another jurisdiction.  
[726] Similarly, the EPEA contemplates overlap and permits inter-jurisdictional agreements to  
allow the assessment process to be carried out jointly (s 57(b)); or to provide for the adoption by  
one or both jurisdictions of all or part of the assessment process and reports of the other: s 57(c).  
Section 55 permits the Minister, following the submission of an environmental impact assessment  
report, to make any recommendations in respect of the activity to the government or agency of  
another jurisdiction.  
246 Alberta Energy Regulator & Impact Assessment Agency of Canada, Decision 2021 ABAER 010: Benga Mining  
Limited, Grassy Mountain Coal Project, Crowsnest Pass (Report), by the Joint Review Panel Established by the  
Federal Minister of Environment and Climate Change and the Alberta Energy Regulator, CEAA Reference No 80101  
(17 June 2021).  
Page: 201  
[727] Both the federal and provincial statutory schemes envision and support consultation and  
the sharing of information relating to environmental assessments and related matters: see IAA,  
ss 21, 22(1)(o); EPEA, ss 10, s 12(b).  
[728] That a goal of the IAA is to promote cooperation and coordinated action between federal  
and provincial jurisdictions is shown by the Minister’s statements during the Bill C-69 legislative  
debates. In Second Reading in the House of Commons, the Minister made the following  
comments:  
I am very pleased that we are bringing forward better rules for reviewing major  
projects. That is not just pipelines. That is hydro projects. That is mines ...  
[W]e will have a single agency, the impact assessment agency of Canada, which  
will lead all impact assessments for major projects. That will ensure the approach  
is consistent and efficient. That is something the industry made very clear that it  
needed. Also, our goal is one project, one review. We need to streamline the  
process and coordinate with provinces and territories to reduce red tape for  
companies and avoid duplicating efforts in reviewing proposed projects. We have  
also reduced the timelines.247 [emphasis added]  
[729] These goals were reiterated at Third Reading in the House of Commons.248  
[730] In summary, the IAA and EPEA contain provisions that contemplate cooperation between  
various jurisdictions and agencies, including Canada’s Agency, Alberta’s agencies, and  
Indigenous jurisdictions. The IAA and EPEA schemes can cooperate and are “not incompatible  
with the boundaries dictated by the Constitution Act, 1867: Pan-Canadian Securities Reference  
at para 18. The principle of co-operative federalism supports such an interpretation that will, in  
turn, foster and support the division of powers: Ibid at paras 17-18. An interpretation of the IAA  
that permits interlocking federal and provincial environmental processes to coexist is also  
consonant with the double aspect principle and the presumption of constitutionality.  
v.  
Section 92A(1): Exclusive Jurisdiction over Natural  
Resources?  
[731] Alberta’s position is effectively that s 92A of the Constitution Act, 1867, sometimes called  
the “resource amendment”, creates an enclave for non-renewable resources that is immune from  
247  
“Bill C-69 An Act to enact the Impact Assessment Act and the Canadian Energy Regulatory Act, to amend the  
Navigation Protection Act and to make consequential amendments to other Acts”, 2nd reading, House of Commons  
Debates, 42-1, No 267 (27 February 2018) at 17401 (Hon Catherine McKenna).  
248  
“Bill C-69 An Act to enact the Impact Assessment Act and the Canadian Energy Regulatory Act, to amend the  
Navigation Protection Act and to make consequential amendments to other Acts”, 3rd reading, House of Commons  
Debates, 42-1, No 313 (12 June 2018) at 20774-8.  
Page: 202  
federal assessment. This would mean there is no federal aspectto provincial” natural resource  
projects which nevertheless impact federal matters, such as fish, because s 92A(1) grants the  
provinces exclusive jurisdiction over all aspects of environmental consequences from exploration  
and management of natural resources.  
[732] The starting point for considering s 92A must be first principles.  
[733] The fact that provinces have exclusive jurisdiction to legislate “in relation to” a subject  
does not mean federal legislation of general application cannot apply to that subject. This is a  
crucial distinction in Canadian constitutional law which acts to ensure that a subject within the  
exclusive jurisdiction of one level of government (e.g., “Indians, and Lands reserved for the  
Indians”) does not become an enclave immune from the application of all legislation of the other  
level of government: Cardinal v Attorney General of Alberta, [1974] SCR 695 at 702-703. Indeed,  
it is this distinction that allowed federal assessment legislation to apply to a local work and  
undertaking like the dam in Oldman River without it being legislation in relation to a local work  
and undertaking. Where a local project has a “federal aspect” (i.e., an effect on an area of federal  
jurisdiction), Canada can legislate in relation to that aspect without usurping the “exclusivity” of  
provincial jurisdiction.  
[734] The same is true of s 92A(1), which is the only “exclusive” power in s 92A. There is no  
reason why s 92A(1) should be interpreted differently from other provincial powers in s 92, such  
that the double aspectdoctrine does not apply to natural resource projects. First, there is no  
significance to the placement of s 92A as a standalone provision, which was necessitated by the  
fact that two of its three legislative powers inter-provincial trade (s 92A(2)) and taxation (s  
92A(4)) are not exclusive powers but concurrent powers and thus incapable of being listed  
amongst the exclusive powers in s 92. Second, the reference to “conservation” in s 92A(1)(b) does  
not relate to “the environment” generally, but “non-renewable natural resources and forestry  
resources” only.  
[735] Moreover, there is no support for the view that s 92A(1) creates an enclave of exclusive  
provincial power, either in decided cases or academic authorities. Instead, it is well established  
that the powers in s 92A, in affirming provincial powers over exploration, development,  
conservation and management of non-renewable natural resources, do not diminish any pre-  
existing powers of Parliament: Westcoast Energy Inc v Canada (National Energy Board), [1998]  
1 SCR 322 at paras 80-84, 156 DLR (4th) 456; Ontario Hydro v Ontario (Labour Relations Board,  
[1993] 3 SCR 327 at 376-378 (per La Forest J), 410 (per Iacobucci J, dissenting), 107 DLR (4th)  
457; GGPPA SCC at para 346, per Brown J (in dissent but not on this point); Robert D Cairns,  
Marsha A Chandler & William D Moull, Constitutional Change and the Private Sector: The Case  
of the Resource Amendment(1986) 24:2 Osgoode Hall L J 299 at 299-300; Robert D. Cairns,  
Marsha A. Chandler & William D. Moull, The Resource Amendment (Section 92A) and the  
Political Economy of Canadian Federalism(1985) 23:2 Osgoode Hall L J 253 at 272.  
Page: 203  
[736] Subsection 92A(1) authorizes provincial legislation with intra-provincial purpose and  
effect, but federal powers remain intact:  
Unlike the other subsections of section 92A, subsection 92A (1) states that its  
enumerated powers are conferred exclusivelyon the provincial legislatures.  
Because of this, it could be suggested that subsection 92A (1) restricts federal  
legislative powers to the extent that it may have amplified provincial legislative  
powers. But this is not really the case. For one thing, nothing in subsection 92A  
(1) or in the rest of section 92A, for that matter limits the extraordinary powers  
of Parliament over natural resources. These considerable powers include the  
authority to assume legislative jurisdiction over intra-provincial subject-matters in  
emergencies, or by invoking the federal declaratory power in section 92(10)(c),  
under which Parliament can unilaterally declare a local work wholly within a  
province to be for the General Advantage of Canadaand thus transfer that work  
to exclusive federal jurisdiction. Further, the more ordinary constitutional powers  
of Parliament (such as its jurisdiction over extra-provincial trade and commerce)  
do not usually allow it to legislate directly ‘in relation to’ intra-provincial subject-  
matters, such as those listed in subsection 92A (1). Thus, the entrenchment of those  
intra-provincial powers in the Constitution ‘exclusively’ in favour of the provinces  
does not seem to take from Parliament any jurisdiction that it had before section  
92A. In any event, the judicially developed doctrine of ‘paramountcy’ (by which  
federal legislation prevails over provincial legislation in any event of direct  
conflict) grants precedence to any federal measure that is at odds with a provincial  
measure enacted under subsection 92A (1), notwithstanding that both orders of  
government may be exercising ‘exclusive’ legislative powers.  
Section 92A does not appear to diminish federal legislative powers. By subsection  
92A (3), those powers are expressly preserved in relation to the new provincial  
‘export’ jurisdiction under subsection 92A (2). They are preserved by implication  
with respect to the new provincial taxation jurisdiction under subsection 92A (1),  
because these taxation powers are not said to be ‘exclusive’ to the provinces. And  
they are preserved by implication with respect to the regulatory powers conferred  
on the provinces by subsection 92A (1), even though the provincial powers are there  
said to be ‘exclusive’: this is because nothing in that provision restricts either the  
extraordinary purposes of Parliament to legislate for intra-provincial purposes or  
the ordinary powers of Parliament to legislate for extra-provincial purposes. In  
any event, the judicially developed doctrine of paramountcy will continue to accord  
precedence to any federal legislative measure in the event of a direct conflict with  
249  
any provincial measure enacted under subsection 92A(1).  
[Emphasis added]  
249 William D Moull, “The Legal Effect of the Resource Amendment – What’s New in Section 92A?” in J Peter  
Meekison, Roy J Romanow, and William D Moull, eds, Origins and Meaning of Section 92A: The 1982 Constitutional  
Amendment on Resources (Montreal: Institute for Research on Public Policy: 1985) 33 at 53-54, 61.  
Page: 204  
[737] Nor is the view that s 92A creates an enclave of exclusive provincial power consistent with  
the extrinsic evidence found in the constitutional debates leading up to the passage of s 92A.250  
[738] And finally, an interpretation of s 92A as an enclave of provincial powers is plainly  
inconsistent with the Supreme Court of Canada decision in Moses at para 36:  
There is no doubt that a vanadium mining project, considered in isolation, falls  
within provincial jurisdiction under s. 92A of the Constitution Act, 1867 over  
natural resources. There is also no doubt that ordinarily a mining project anywhere  
in Canada that puts at risk fish habitat could not proceed without a permit from the  
federal Fisheries Minister, which he or she could not issue except after compliance  
with the CEAA. The mining of non-renewable mineral resources aspect falls within  
provincial jurisdiction, but the fisheries aspect is federal.  
[739] In short, the fact that provinces have exclusive legislative jurisdiction over natural  
resources in s 92A(1) of the Constitution Act, 1867 does not preclude federal legislation from  
applying to natural resource projects located solely in one province. Just as the provision does not  
prohibit the application of the Fisheries Act, it does not immunize local natural resource projects  
from federal assessment legislation like the IAA. Accordingly, such natural resource projects are  
not enclaves immune from federal environmental legislation any more than federal undertakings  
are enclaves immune from provincial environmental legislation: Reference re Environmental  
Management Act (British Columbia), 2019 BCCA 181 at para 93, affd 2020 SCC 1.  
3.  
Conclusion as to Validity of the IAA and Regulation  
[740] In my opinion, the IAA and its Regulation are a valid exercise of Parliament’s authority to  
legislate on the matter of the environment. Section 7 of the IAA prohibits proponents of physical  
activities or designated projects on the Project List (or by Ministerial order) from doing anything  
to advance the project if it may cause effects within federal jurisdiction until it can be determined  
whether any such adverse effects are in the public interest. Most of the designated projects involve  
activities within areas of federal jurisdiction and prima facie within s 91 of the Constitution Act,  
1867 such as national parks, interprovincial railways, or offshore oil and gas facilities that may  
have effects upon areas also within federal jurisdiction, such as fish habitat, federal lands, or  
Indigenous peoples. The remainder of the designated projects are intra-provincial and prima facie  
within s 92 or 92A of the Constitution Act, 1867 such as certain mines and metal mills, and oil  
and gas facilities that may have effects upon areas of federal jurisdiction, such as fish habitat,  
federal lands, or Indigenous peoples. In either case, the project-based federal environmental  
assessment regime in the IAA and Regulation target adverse environmental effects in federal  
jurisdiction.  
250  
Canada, Parliament, Minutes of Proceedings and Evidence of the Special Joint Committee of the Senate and of the  
House of Commons on the Constitution of Canada, 32nd Parl, 1st Sess, No 54 (5 February 1981) at 54:38 to 54:76.  
Page: 205  
[741] The history, extrinsic and intrinsic evidence, and the literal interpretation of the IAA and  
Regulation support its constitutionality, as do the presumption of constitutionality, double aspect  
doctrine, and imperatives of cooperative federalism.  
C.  
Inter-Jurisdictional Immunity  
1. Issue not Raised by Reference Questions  
[742] Alberta submits that the IAA should be declared ultra vires in its entirety, but if found valid  
as limited to activities under federal jurisdiction, the doctrine of interjurisdictional immunity  
applies so that this Court should declare that the IAA does not apply to activities and undertakings  
exclusively under provincial jurisdiction, including those “designated activities” listed in the  
Regulation. Alberta contends there is a minimum unassailable core of federal and provincial heads  
of power into which the other level of power cannot intrude. Its argument comes back to the  
position that the IAA and Regulation constitute a federal veto power over provincial projects; that  
the core of the power to manage and develop natural resources must include the final determination  
of whether a given project should proceed based on an evaluation of its benefits and effects. The  
federal approval process therefore impairs the provinces’ exclusive legislative competence.  
[743] Canada replies that the doctrine of interjurisdiction immunity presumes the law is valid, so  
that this argument is beyond the scope of the specific Reference questions.  
[744] Professor Hogg recounts the ways to attack a law said to be outside the jurisdiction of the  
enacting legislature. The first is to argue “that the law is invalid because the matter of the law (or  
its pith and substance) comes within a class of subjects that is outside the jurisdiction of the  
enacting legislative body”: Hogg at § 15:16. The question posed by this Reference is: are the IAA  
and Regulation unconstitutional in whole or in part, as being beyond the legislative authority of  
the Parliament of Canada under the Constitution of Canada?” The question before us involves the  
first method of attack: it asks whether the law is invalid because it is beyond Parliament’s  
jurisdiction.  
[745] The second approach is to “acknowledge that the law is valid in most of its application, but  
to argue that the law should be interpreted so as not to apply to the matter that is outside the  
jurisdiction of the enacting body … the law is not held to be invalid but simply inapplicable to the  
extra-jurisdictional matter”: Ibid. This approach of limiting the applicability of a law by reading it  
down is defined by Professor Hogg, and others, as the doctrine of interjurisdictional immunity.  
[746] The third approach is to argue “that the law is inoperative through the doctrine of  
paramountcy … that, where there are inconsistent federal and provincial laws, it is the federal law  
that prevails; paramountcy renders the provincial law inoperative to the extent of the  
inconsistency”: Ibid [emphasis in original]. This method of attack is not used in this case.  
Page: 206  
[747] This Reference questions the constitutional validity of the IAA and Regulation. The answer  
to the questions posed is that the IAA and Regulation are either invalid as unconstitutional or are  
valid. Alberta’s submission that this Court should declare the IAA and Regulation inapplicable to  
the extent of their application to activities and undertakings it says are exclusively under provincial  
jurisdiction natural resources, for example raises a question not within the scope of this  
Reference. Our jurisdiction is limited to the question asked. This is a full answer to the  
interjurisdictional immunity argument raised by Alberta: application of the doctrine is beyond the  
scope of this Reference. The argument that interjurisdictional immunity was beyond the scope of  
the Reference questions was accepted in Reference Re Greenhouse Gas Pollution Pricing Act,  
2019 SKCA 40 at paras 206-209.  
2.  
If the Application of the Doctrine of Interjurisdictional Immunity is  
Not Beyond the Reference Scope, In Any Event, It Does Not Apply Here  
[748] The IAA and Regulation are either constitutionally valid or invalid. If they are valid, and  
the application of the doctrine of interjurisdictional immunity is not beyond the scope of this  
Reference, then a preliminary issue is whether the doctrine applies to federal legislation at all, such  
that a federal law can be found inapplicable for having intruded too deeply into provincial  
jurisdiction. The doctrine serves to determine whether the valid law is applicable or operative in  
these specific circumstances: Canadian Western Bank at para 76. In my view, the  
interjurisdictional immunity doctrine does not apply in the circumstances of this case.  
[749] Alberta relies on Canadian Western Bank to submit that the IAA meets both parts of the  
test for application of the doctrine of interjurisdictional immunity: the IAA encroaches on Alberta’s  
exclusive jurisdiction over development and management of natural resources under s 92A of the  
Constitution, 1867, and profoundly impairs it by creating a federal veto power over natural  
resources projects. A law that trenches on the core of power of another level of government must  
be read down so as not to apply to the matter within the other level of government’s jurisdiction.  
[750] Canada submits that the Supreme Court of Canada has limited the application of the  
interjurisdictional immunity doctrine and rejected its application to protect provincial legislation  
from the application of federal legislation on the occasions when it has been argued, citing Canada  
(Attorney General) v PHS Community Services Society, 2011 SCC 44 at paras 61-64, 67-70, [2011]  
3 SCR 134 [PHS] and Carter v Canada (Attorney General), 2015 SCC 5 at paras 49-53, [2015] 1  
SCR 331.  
[751] The parties join issue over whether the doctrine of interjurisdictional immunity applies to  
federal legislation at all, such that a federal law can be found inapplicable for having intruded too  
deeply into provincial jurisdiction. The Supreme Court of Canada has never found an instance  
where a province has been able to avail itself of the interjurisdictional immunity doctrine, though  
it has suggested that the doctrine is theoretically reciprocal: Canadian Western Bank at para 35.  
However, the Court in that case also called for a restrained approach to the doctrine, noting that  
Page: 207  
interjurisdictional immunity is of limited application and should in general be reserved for  
situations already covered by precedent: Canadian Western Bank at para 77 [emphasis added].  
[752] What this means in practice, said the Court more recently, is that we will usually not  
expand the doctrine to protect the core of legislative powers that have not already been so defined  
in our jurisprudence: Desgagnés Transport at para 93. In my view, since there is no precedent to  
date on protecting the coreof s 92A(1), this case, involving as it does the environment and  
environmental protection legislation, already found by the Supreme Court of Canada to cut across  
heads of both federal and provincial power, is not the circumstance in which to expand the doctrine.  
[753] Second, and alternatively, if it is decided that s 92A(1) is an appropriate candidate for the  
application of the doctrine of interjurisdictional immunity, it would still have to be determined  
what the coreof s 92A (1) is and whether the IAA and Regulation impair that core.  
[754] The test for application of the interjurisdictional immunity doctrine is summarized  
in Desgagnés Transport at para 92: Two conditions must be met for the doctrine to apply. First,  
the impugned provision must trench on the core of an exclusive head of power under the  
Constitution Act, 1867. Second, the effect of this overlap must impair the exercise of the core of  
the head of power.  
[755] Alberta contends that even if the IAA is valid, federal assessments should be inapplicable  
to natural resource projects falling under s 92A because the IAA impairs the coreof s 92A(1). It  
is incumbent upon Alberta to delineate a “core” of an exclusively provincial power: PHS at para  
68. The issue in the PHS case was “whether the delivery of health care services constitutes a  
protected core of the provincial power over health care in s. 92(7), (13) and (16) . . . and is  
therefore immune from federal interference”: at para 66. The Court concluded that it did not. In  
PHS, the Court rejected the proposed core of the “provincial health power” because such “a vast  
core would sit ill with the restrained application of the doctrine called for by the jurisprudence”:  
Ibid at para 68.  
[756] Alberta’s identification of the core of its power to manage and develop natural resources is  
“the ultimate decision over whether and when resources will be developed, and the balancing of  
the interests central to such decisions” (Alberta’s Factum at para 154).  
[757] Alberta identifying the coreof s 92A(1) as the ultimate decision over the development  
of natural resources is too broad, since it would then immunize natural resource projects from  
federal legislation such as the Fisheries Act, clearly a function of the federal fisheries power under  
s 91(12). A coreis meant to be a subset of the overall power: Canadian Western Bank at para  
51; Desgagnés Transport at para 95. Conversely, the ultimate decision over whether and when  
resources will be developed, and the balancing of the interests central to such decisions, seems to  
subsume the entirety of the power itself.  
Page: 208  
[758] Alberta identifying the coreof the natural resources power more specifically as the  
issuance of ultimate approval or permits for natural resource projects is also problematic since the  
IAA does not impair a provinces ability to issue approval or permits what the IAA does, at least  
in certain circumstances, is make those permits insufficient for the project to proceed as planned.  
But so does the Fisheries Act in certain cases. The logical extension of Alberta’s analysis rendering  
the IAA inapplicable to natural resource projects would likewise render federal legislation like the  
Fisheries Act inapplicable, directly contrary to express federal powers under s 91.  
[759] In these two ways, Alberta’s position seeks to turn natural resource projects that fall under  
s 92A into enclavesimmune from federal legislation. The notion of an enclaveof power runs  
contrary to modern federalism, with its emphasis on the double aspect doctrine, overlapping  
jurisdiction, and cooperative federalism, in favour of the long discarded watertight  
compartments” doctrine. In the words of the Chief Justice writing for the Court in PHS: “the  
doctrine of interjurisdictional immunity is narrow” and its “premise of fixed watertight cores is in  
tension with the evolution of Canadian constitutional interpretation towards the more flexible  
concepts of double aspect and cooperative federalism”: para 70. Indeed, as noted above,  
environmental assessment legislation is itself a quintessential example of these modern trends  
because shared jurisdiction over the environmenthas required that Canada and the provinces  
work together often through bilateral agreements to properly deal with multifaceted  
environmental concerns.  
VI.  
Conclusion  
[760] It is my opinion that the IAA, establishing a federal environmental impact assessment  
regime, is a valid exercise of federal constitutional authority. The answers to the questions are:  
Is Part 1 of An Act to enact the Impact Assessment Act and the Canadian Energy Regulator  
Act, to amend the Navigation Protection Act and to make consequential amendments to  
other Acts, S.C. 2019, c. 28, unconstitutional in whole or in part, as being beyond the  
legislative authority of the Parliament of Canada under the Constitution of Canada? No.  
Is the Physical Activities Regulations, SOR/2019-285, unconstitutional in whole or in part  
by virtue of purporting to apply to certain activities listed in Schedule 2 thereof that relate  
to matters entirely within the legislative authority of the Provinces under the Constitution  
of Canada? No.  
[761] The federal environmental assessment regime in the IAA and Regulation prohibits projects  
on the Project List that may have effects in federal jurisdiction on fish and fish habitat, aquatic  
species, migratory birds, on federal lands or federally funded projects, between provinces, outside  
Canada, and with respect to Indigenous peoples from proceeding unless and until the proponents  
engage the process and a decision is made that an assessment in unnecessary or that it is in the  
public interest for the project to proceed.  
Page: 209  
[762] The IAA and Regulation are the product of broad community consultation and the result of  
effectuating the collective views of many stakeholders, including Indigenous groups, NGOs,  
provinces, territories and municipalities, industry associations and companies.251 The IAA and  
Regulation comprise Canada’s effort to move towards sustainability while balancing the interests  
of the economy, communities, Indigenous peoples, and international commitments. Regulation of  
environmental impacts to capitalize upon the earth’s resources with minimal impact is the way of  
the future in a world where fresh air and clean water will be seen as fundamental human rights,  
requiring a balance between the interests of a thriving economy and the interests of protecting the  
environment and people from its harmful effects.  
[763] In a thought-provoking cri de coeur written prior to promulgation of the IAA and  
Regulation, environmental academics envisioned a future where sustainability assessments are  
responsive to the interests of both the economy and the citizenry, calling for harmonization of  
environmental assessment regimes among multiple jurisdictional actors, including the federal  
government, provinces, territories, municipalities, Indigenous peoples, NGOs, academia, project  
proponents and industry groups, as well as the Canadian public. This approach is anticipated to  
have “the potential not only to resolve intensifying multijurisdictional disputes over the direction  
of energy and economic development in Canada in a manner that is effective, efficient, and socially  
inclusive, but also to develop widely-shared commitments about Canada’s future”.252  
[764] All this to say, the complexities and urgency of the climate crisis call for co-operative,  
interlocking environmental protection regimes among multiple jurisdictions, each functioning at  
its highest and best within their constitutional jurisdiction.  
[765] In my opinion, in enacting the IAA and Regulation, Parliament has established a federal  
environmental assessment regime designed to regulate effects within federal jurisdiction caused  
by physical activities or designated projects; and to authorize such projects when it is in the public  
interest to do so, in cooperation with other jurisdictions that bear responsibility for the  
environment, especially the provinces and First Nations. The IAA confines its reach to protection  
of the environment and the health, social and economic conditions within Parliament’s legislative  
authority from the adverse environmental effects of select activities that in its view, have the  
greatest potential for adverse effects on areas of federal jurisdiction. Having done so, the  
legislative regime prescribed in the IAA and Regulation is a valid exercise of Parliament’s authority  
and compliant with the Constitution Act, 1867, as amended.  
Special Hearing heard February 22-25, 2021  
Opinion filed at Calgary, Alberta  
251  
See Canada, Canadian Environmental Assessment Agency, Building Common Ground: a new vision for impact  
assessment in Canada (Final Report of the Expert Panel for the Review of Environmental Assessment Processes)  
(Canadian Environmental Assessment Agency, 2017) at 86-106.  
252  
MacLean, Doelle & Tollefson at 66.  
Page: 210  
this 10th day of May, 2022  
Greckol J.A.  
Page: 211  
Appearances:  
E.B. Mellett  
B.S. Gilmour  
R.C. Steele  
S.R. Assie  
for the Appellant Attorney General of Alberta  
B.F. Hughson  
K.E. Boyd  
J.R. Elford  
for the Respondent Attorney General of Canada  
J. Hunter  
Y. Ranganathan  
for the Intervenor Attorney General of Ontario  
T. Irvine  
N.S. Wernikowski  
for the Intervenor Attorney General of Saskatchewan  
R. Lindgren  
J. Castrilli  
for the Intervenor Canadian Environmental Law Association, Environmental Defence  
Canada Inc. and Miningwatch Canada Inc.  
A. Johnston  
for the Intervenor Nature Canada  
R.H. Reynolds, Q.C.  
E.A. Picard  
for the Intervenor Woodland Cree First Nation  
P.G. Chiswell  
R.L. Martz  
B. Downey  
for the Intervenor Canadian Association of Petroleum Producers and the Explorers and  
Producers Association of Canada  
M.A. Marion  
B.R. Carlson  
for the Intervenor Canadian Energy Pipeline Association  
Page: 212  
Page: 213  
L.D. Rae  
for the Intervenor Indian Resource Council  
M. Price  
A. Laskin  
for the Intervenor Mikisew Cree First Nation  
J.L. Ginsberg  
A. McIntosh  
for the Intervenor Ecojustice Canada Society  
R.B.E. Hallsor, Q.C.  
H. Felix  
for the Intervenor Canadian Taxpayers Federation  
P.A. Gall, Q.C.  
A. Zwack  
for the Intervenor Independent Contractors and Businesses Association and the Alberta  
Enterprise Group  
E.P. Murphy  
M. Hulse  
for the Intervenor Athabasca Chipewyan First Nation  


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