Page: 37
[57]
Where the legislature chooses to grant authority to a decision maker using broad, open-
ended or highly qualitative language, with no right of appeal to a court, then the legislature’s
intention that the decision maker have greater flexibility in interpreting its enabling statute
should be given effect: Vavilov at paras 68, 110.
[68] Reasonableness review does not give administrative
decision makers free rein in interpreting their enabling statutes, and
therefore does not give them licence to enlarge their powers
beyond what the legislature intended. Instead, it confirms that the
governing statutory scheme will always operate as a constraint on
administrative decision makers and as a limit on their
authority. Even where the reasonableness standard is applied in
reviewing a decision maker’s interpretation of its authority, precise
or narrow statutory language will necessarily limit the number
of reasonable interpretations open to the decision maker —
perhaps limiting it one. Conversely, where the legislature has
afforded a decision maker broad powers in general terms — and
has provided no right of appeal to a court — the legislature’s
intention that the decision maker have greater leeway in
interpreting its enabling statute should be given effect. […]
[110] Whether an interpretation is justified will depend on the
context, including the language chosen by the legislature in
describing the limits and contours of the decision maker’s
authority. If a legislature wishes to precisely circumscribe an
administrative decision maker’s power in some respect, it can do
so by using precise and narrow language and delineating the power
in detail, thereby tightly constraining the decision maker’s ability
to interpret the provision. Conversely, where the legislature
chooses to use broad, open-ended or highly qualitative language —
for example, “in the public interest” — it clearly contemplates that
the decision maker is to have greater flexibility in interpreting the
meaning of such language. […]
[Emphasis added]
[58] Parliament did precisely this in providing that the Commission may attach to a licence
“any term or condition that the Commission considers necessary for the purposes of this Act,”
pursuant to s 24(5) of the NSCA. This is but one of the several “broad powers” the legislature has