HEALTH & RETIREMENT PROPERTIES TRUST
424B3, 1997-06-10
REAL ESTATE INVESTMENT TRUSTS
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PROSPECTUS                                    Filed Pursuant to Rule 424(b)(3)
                                              Reg. No. 333-26887
                                 $1,000,000,000
                     Health and Retirement Properties Trust
 Debt Securities, Preferred Shares of Beneficial Interest, Depositary Shares, 
               Common Shares of Beneficial Interest and Warrants
                             ----------------------

         Health and  Retirement  Properties  Trust (the  "Company" or "HRP") may
from time to time offer in one or more series (i) its unsecured debt  securities
(the "Debt Securities"),  (ii) its preferred shares of beneficial interest,  par
value $.01 per share (the "Preferred  Shares"),  (iii) fractional  shares of the
Preferred Shares (the "Depositary Shares"), (iv) its common shares of beneficial
interest,  par value $.01 per share (the  "Common  Shares"),  or (v) warrants to
purchase any of the above securities (the "Warrants"),  with an aggregate public
offering price of up to  $1,000,000,000 on terms to be determined at the time of
offering.  The Debt Securities,  Preferred  Shares,  Depositary  Shares,  Common
Shares and Warrants  (collectively,  the "Offered  Securities")  may be offered,
separately or together,  in separate series, in amounts,  at prices and on terms
to be set forth in a supplement to this Prospectus (a "Prospectus Supplement").

         The specific  terms of the Offered  Securities in respect of which this
Prospectus is being  delivered  will be set forth in the  applicable  Prospectus
Supplement  and  will  include,  where  applicable:  (i) in  the  case  of  Debt
Securities,  the specific title,  aggregate  principal  amount,  currency,  form
(which may be  registered  or bearer,  or  certificated  or global),  authorized
denominations,  maturity,  rate (or manner of  calculation  thereof) and time of
payment  of  interest,  terms for  redemption  at the  option of the  Company or
repayment at the option of the holder,  terms for sinking fund  payments,  terms
for conversion into Preferred Shares,  Depositary Shares or Common Shares, terms
for  subordination  to other  indebtedness  of the Company,  any original  issue
discount and any initial public  offering  price;  (ii) in the case of Preferred
Shares,  the  specific  title  and  stated  value,  any  dividend,  liquidation,
redemption, conversion, voting and other rights, and any initial public offering
price;  (iii)  in the  case of  Depositary  Shares,  the  fractional  shares  of
Preferred  Shares  represented  by each  Depositary  Share,  (iv) in the case of
Common  Shares,  any  offering  price;  and  (v) in the  case of  Warrants,  the
securities to which they relate,  duration,  offering price,  exercise price and
detachability.

         The applicable  Prospectus  Supplement  will also contain  information,
where applicable,  about certain United States federal income tax considerations
relating to, and any listing on a securities exchange of, the Offered Securities
covered by such Prospectus Supplement.
                             ----------------------

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
       AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
       THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COM-
        MISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
            ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                             ----------------------

         The  Offered  Securities  may  be  offered  directly,   through  agents
designated  from time to time by the  Company or to or through  underwriters  or
dealers.  If any agents or  underwriters  are involved in the sale of any of the
Offered  Securities,  their  names,  and any  applicable  purchase  price,  fee,
commission or discount  arrangement between or among them, will be set forth, or
will be calculable from the information set forth, in an accompanying Prospectus
Supplement.  See  "Plan of  Distribution."  No  Offered  Securities  may be sold
without delivery of a Prospectus  Supplement  describing the method and terms of
the offering of such Offered Securities.
                             ----------------------


                  The date of this Prospectus is May 30, 1997.


<PAGE>


         No person has been  authorized to give any  information  or to make any
representations  other than those contained or incorporated by reference in this
Prospectus in connection  with the offer  contained in this  Prospectus  and, if
given or made, such  information or  representations  must not be relied upon as
having been  authorized by the Company or any  underwriters,  agents or dealers.
This Prospectus does not constitute an offer to sell or solicitation of an offer
to buy  securities in any  jurisdiction  to any person to whom it is unlawful to
make such offer or solicitation. Neither the delivery of this Prospectus nor any
sale made hereunder shall, under any  circumstances,  create an implication that
there has been no change in the  affairs  of the  Company  and its  subsidiaries
since the date hereof or the information  contained or incorporated by reference
herein is correct at any time subsequent to the date hereof.

                              AVAILABLE INFORMATION

         The Company has filed with the Securities and Exchange  Commission (the
"Commission")  in  Washington,  D.C.,  a  registration  statement  on  Form  S-3
(together with all exhibits, schedules and amendments thereto, the "Registration
Statement") under the Securities Act of 1933, as amended (the "Securities Act"),
with respect to the Offered Securities. This Prospectus,  which is a part of the
Registration Statement, does not contain all of the information set forth in the
Registration Statement.  Statements in this Prospectus as to the contents of any
contract or other document are not  necessarily  complete,  and in each instance
reference is made to the copy of such  contract or other  documents  filed as an
exhibit to the  Registration  Statement,  each such statement being qualified in
all  respects by such  reference  and the exhibits and  schedules  thereto.  For
further information concerning the Company and the Offered Securities, reference
is made to the Registration Statement.  Copies of the Registration Statement may
be obtained from the Commission at its principal office in Washington, D.C. upon
payment of the prescribed fee.

         The  Company  is  subject  to  the  informational  requirements  of the
Securities  Exchange  Act of 1934,  as amended  (the  "Exchange  Act"),  and, in
accordance  therewith,  files reports and other information with the Commission.
The Registration  Statement,  the exhibits and schedules  forming a part thereof
and the reports,  proxy  statements and other  information  filed by the Company
with the Commission can be inspected and copies obtained at the public reference
facilities maintained by the Commission at Judiciary Plaza, Room 1024, 450 Fifth
Street, N.W.,  Washington,  D.C. 20549, and at the following regional offices of
the Commission:  Chicago Regional  Office,  Suite 1400, 500 West Madison Street,
Chicago,  Illinois  60661-2511;  and New York Regional Office, Seven World Trade
Center,  New York,  New York 10048.  Copies of such  material can be obtained at
prescribed  rates from the Public  Reference  Section of the  Commission  at its
principal  office  at 450  Fifth  Street,  N.W.,  Washington,  D.C.  20549.  The
Commission  maintains  a World Wide Web site that  contains  reports,  proxy and
information  statements and other information regarding  registrants,  including
the Company,  that file electronically  with the Commission.  The address of the
site is  http://www.sec.gov.  The Company's  Common Shares are traded on the New
York Stock  Exchange  ("NYSE")  under the symbol "HRP," and similar  information
concerning  the Company may be  inspected  at the office of the NYSE at 20 Broad
Street, New York, New York 10005.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The  following  documents,  which have been  filed with the  Commission
pursuant to the Exchange Act, are hereby  incorporated  in this  Prospectus  and
specifically made a part hereof by reference: (i) the Company's Annual Report on
Form 10-K for the fiscal year ended  December  31, 1996 (the  "Annual  Report"),
(ii) the Company's Quarterly Report on Form 10-Q for the quarter ended March 31,
1997,  (iii) the  information in Item 5, Other Events,  under the caption "Legal
Proceedings"  contained  in the  Company's  Current  Report  on Form  8-K  dated
February 13, 1997, (iv) the Company's Current Reports on Form 8-K dated February
17,  1997 and March 14,  1997,  (v) the  consolidated  financial  statements  of
Marriott  International,  Inc. ("MII"), at and for the fiscal year ended January
3, 1997,  as contained  in MII's  Annual  Report on Form 10-K for the year ended
January 3, 1997 (Commission  File No. 1-12188),  and (vi) the description of the
Company's  Common Shares  contained in the Company's  Registration  Statement on
Form 8-A dated  November 8, 1986, as amended by Form 8 dated July 30, 1991.  All
documents filed by the Company pursuant to Section 13(a),  13(c), 14 or 15(d) of
the Exchange Act (i)

                                        2

<PAGE>



subsequent to the date of this  Prospectus  and prior to the  termination of the
offering  of the  Offered  Securities  shall be  deemed  to be  incorporated  by
reference into this Prospectus and to be a part hereof from the respective dates
of filing of such documents.

         Any statement contained herein or in a document  incorporated or deemed
to be  incorporated  herein  by  reference  shall be deemed  to be  modified  or
superseded  for  purposes  of this  Prospectus  to the extent  that a  statement
contained  herein  (or  in  the  applicable  Prospectus  Supplement),  or in any
subsequently filed document that also is or is deemed to be incorporated  herein
by  reference,  modifies or supersedes  such  statement.  Any such  statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Prospectus.

         The Company hereby  undertakes to provide without charge to each person
to whom this  Prospectus is delivered,  upon the written or oral request of such
person, a copy of any and all of the information  that has been  incorporated by
reference  in this  Prospectus  (excluding  exhibits  unless such  exhibits  are
specifically incorporated by reference into the information that this Prospectus
incorporates).  Requests  for such  copies  should be made to the Company at its
principal executive offices,  400 Centre Street,  Newton,  Massachusetts  02158,
Attention: Investor Relations, telephone (617) 332-3990.


                                        3

<PAGE>



                                   THE COMPANY

         The Company is a real estate  investment  trust  ("REIT") which invests
primarily in retirement  communities,  assisted living  centers,  long-term care
facilities  and other  income  producing  healthcare  related real estate and in
office buildings leased to various agencies of the United States government.  At
May 1, 1997, the Company had  investments  totaling (at cost) over $1.7 billion,
of which  approximately  68%  represented  healthcare  related  properties,  26%
represented U.S. Government-leased office buildings and 6% represented an equity
investment  in  Hospitality   Properties   Trust  ("HPT"),   a  New  York  Stock
Exchange-listed  REIT  founded by the  Company  which  invests  in  hotels.  The
Company's  investments  on such date were in over 200  properties  located in 32
states.  Additionally,  on May 1, 1997,  HPT owned and leased an aggregate of 92
hotels located in 29 states.

         The Company is organized as a Maryland  real estate  investment  trust.
The  Company's  principal  place  of  business  is 400  Centre  Street,  Newton,
Massachusetts 02158 and its telephone number is (617) 332-3990.

                                 USE OF PROCEEDS

         Unless otherwise described in the applicable Prospectus Supplement, the
Company intends to use the net proceeds from the sale of the Offered  Securities
for general  business  purposes,  which may include the acquisition of, or other
investments in, retirement communities,  assisted living centers, long-term care
facilities or other health care related properties or government-leased or other
office  buildings and the repayment of indebtedness  outstanding at such time or
the  reduction of amounts  outstanding  under the Company's  credit  facilities.
Pending  utilization  as set  forth  above,  the  proceeds  from the sale of the
Offered  Securities  will be  invested  in  short  term  investments,  including
repurchase agreements. Such investments may not be investment grade.

                       RATIO OF EARNINGS TO FIXED CHARGES

         The  following  table sets forth the Company's  consolidated  ratios of
earnings to fixed charges for the periods indicated:
<TABLE>
<CAPTION>
                                        
                                            For the quarter ended             
                                               March 31, 1997                     For the year ended December 31,
                                               --------------     ---------------------------------------------------------
                                                                    1996       1995         1994        1993         1992
                                                                    ----       ----         ----        ----         ----
<S>                                             <C>                <C>        <C>          <C>         <C>          <C>

Ratio of earnings to fixed charges               3.4x               4.3x       3.4x         6.7x        6.8x         3.6x
</TABLE>


         The ratios of earnings to fixed charges  presented  above were computed
by dividing the Company's earnings by fixed charges. For this purpose,  earnings
have been  calculated  by adding fixed  charges to income  before  income taxes,
extraordinary items and gain or loss on the disposition of real property.  Fixed
charges consist of interest costs, whether expensed or capitalized, the interest
component of rental expense, if any, amortization of debt discounts and deferred
financing costs,  whether expensed or capitalized.  To date, the Company has not
issued any Preferred Shares;  therefore, the ratio of earnings to combined fixed
charges  and  Preferred  Shares  distributions  are the  same as the  ratios  of
earnings to fixed charges presented above.

                         DESCRIPTION OF DEBT SECURITIES

         The Debt  Securities  will be issued under one or more  indentures  (an
"Indenture")  between the Company and a trustee (an  "Indenture  Trustee").  Any
Indenture will be subject to, and governed by, the Trust  Indenture Act of 1939,
as amended (the "TIA"). The statements made hereunder relating to any Indentures
and the Debt  Securities  to be  issued  thereunder  are  summaries  of  certain
anticipated provisions thereof and do not purport to be complete and are subject
to, and are qualified in their  entirety by reference to, all  provisions of the
Indentures and such Debt Securities.


                                        1

<PAGE>



General

         The Company has filed with its  Registration  Statement with respect to
the Offered  Securities a form of Indenture (as supplemented  from time to time,
the "Senior  Indenture")  relating to the Senior  Securities  (as defined) and a
form of  Indenture  (as  supplemented  from  time  to  time,  the  "Subordinated
Indenture")  relating to the  Subordinated  Securities  (as  defined).  The Debt
Securities will be direct,  unsecured  obligations of the Company and, if issued
under the Senior  Indenture,  will rank equally and ratably with other unsecured
and unsubordinated indebtedness of the Company (the "Senior Securities"), or, if
issued  under  the  Subordinated  Indenture,  will be  subordinated  in right of
payment to the prior payment in full of Senior  Indebtedness  (as defined in the
applicable   Prospectus    Supplement)    ("Subordinated    Securities").    See
"--Subordination".  The  Debt  Securities  may be  issued  without  limit  as to
aggregate  principal  amount, in one or more series, in each case as established
from time to time in or pursuant to  authority  granted by a  resolution  of the
Board of Trustees of the Company (the  "Trustees")  or as  established in one or
more indentures supplemental to any Indenture. All Debt Securities of one series
need not be issued at the same time and, unless otherwise provided, a series may
be reopened,  without the consent of the holders of the Debt  Securities of such
series, for issuances of additional Debt Securities of such series.

         It is anticipated that any Indenture will provide that the Company may,
but need not,  designate more than one Indenture Trustee  thereunder,  each with
respect to one or more series of Debt  Securities.  Any Indenture  Trustee under
any  Indenture  may resign or be removed  with  respect to one or more series of
Debt Securities,  and a successor Indenture Trustee may be appointed to act with
respect  to such  series.  In the event that two or more  persons  are acting as
Indenture Trustee with respect to different series of Debt Securities, each such
Indenture  Trustee shall be a trustee of a trust under the applicable  Indenture
separate and apart from the trust  administered by any other Indenture  Trustee,
and, except as otherwise  indicated  herein,  any action  described herein to be
taken by the Indenture  Trustee may be taken by each such Indenture Trustee with
respect to, and only with respect to, the one or more series of Debt  Securities
for which it is Indenture Trustee under the applicable Indenture.

         Reference is made to the Prospectus  Supplement  relating to the series
of Debt  Securities  being offered for the specific  terms  thereof,  including,
where applicable, the following:

         (1)      the  title of such  Debt  Securities  and  whether  such  Debt
                  Securities are Senior Securities or Subordinated Securities;

         (2)      the aggregate principal amount of such Debt Securities and any
                  limit on such aggregate principal amount;

         (3)      the  percentage  of the  principal  amount at which  such Debt
                  Securities  will be issued  and,  if other than the  principal
                  amount  thereof,  the portion of the principal  amount thereof
                  payable  upon  declaration  of  acceleration  of the  maturity
                  thereof,  or (if  applicable)  the  portion  of the  principal
                  amount of such Debt Securities  which is  convertible,  or the
                  method by which any such portion shall be determined;

         (4)      if  convertible,  the terms on which such Debt  Securities are
                  convertible,  including the initial  conversion  price or rate
                  and the conversion  period and any  applicable  limitations on
                  the ownership or  transferability of the securities into which
                  such Debt Securities are convertible;

         (5)      the date or dates, or the method for determining  such date or
                  dates,  on which the principal of such Debt Securities will be
                  payable;

         (6)      the rate or rates  (which  may be fixed or  variable),  or the
                  method by which  such rate or rates  shall be  determined,  at
                  which such Debt Securities will bear interest, if any;


                                        2

<PAGE>

         (7)      the date or dates, or the method for determining  such date or
                  dates, from which any interest will accrue, the dates on which
                  any such interest  will be payable,  the record dates for such
                  interest  payment dates,  or the method by which any such date
                  shall be determined, the person to whom such interest shall be
                  payable, and the basis upon which interest shall be calculated
                  if other than that of a 360-day  year of 12 months  consisting
                  of 30 days each;

         (8)      the place or places  where the  principal  of, any premium and
                  interest on, and any additional  amounts payable in respect of
                  such Debt Securities will be payable, such Debt Securities may
                  be surrendered  for conversion or  registration of transfer or
                  exchange  and  notices or  demands  to or upon the  Company in
                  respect of such Debt  Securities and the applicable  Indenture
                  may be served;

         (9)      the period or  periods  within  which,  the price or prices at
                  which  and the  terms  and  conditions  upon  which  such Debt
                  Securities  may be  redeemed,  as a whole or in  part,  at the
                  option  of the  Company,  if the  Company  is to have  such an
                  option;

         (10)     the  obligation,  if any, of the  Company to redeem,  repay or
                  purchase such Debt Securities  pursuant to any sinking fund or
                  analogous provision or at the option of a holder thereof,  and
                  the period or  periods  within  which,  the price or prices at
                  which  and the  terms  and  conditions  upon  which  such Debt
                  Securities will be redeemed,  repaid or purchased,  as a whole
                  or in part, pursuant to such obligation;

         (11)     if other than U.S.  dollars,  the  currency or  currencies  in
                  which such Debt Securities are denominated and payable,  which
                  may be a  foreign  currency  or units  of two or more  foreign
                  currencies  or a  composite  currency or  currencies,  and the
                  terms and conditions relating thereto;

         (12)     if the  principal  of or premium,  if any, or interest on such
                  Debt  Securities  is to be  payable,  at the  election  of the
                  Company  or a holder  thereof,  in one or more  currencies  or
                  currency  units  other  than that or those in which  such Debt
                  Securities are stated to be payable, the currency,  currencies
                  or currency  units in which  payment of the  principal  of and
                  premium,  if any,  and  interest  on Debt  Securities  of such
                  series as to which such election is made shall be payable, and
                  the periods  within  which and the terms and  conditions  upon
                  which such election is to be made;

         (13)     whether the amount of payments of principal  of (and  premium,
                  if any) or interest,  if any, on such Debt  Securities  may be
                  determined with reference to an index, formula or other method
                  (which index, formula or method may, but need not, be based on
                  a currency,  currencies,  currency  unit or units or composite
                  currency or  currencies)  and the manner in which such amounts
                  shall be determined;

         (14)     the events of default or covenants of such Debt Securities, to
                  the extent  different  from or in addition to those  described
                  herein,  and any  provisions  granting  special  rights to the
                  holders of such Debt  Securities upon the occurrence of events
                  specified in such Prospectus Supplement;

         (15)     whether such Debt  Securities  will be issued in  certificated
                  and/or book-entry form;

         (16)     whether such Debt  Securities  will be in registered or bearer
                  form and, if in registered form, the denominations  thereof if
                  other than $1,000 and any integral multiple thereof and, if in
                  bearer  form,   the   denominations   thereof  and  terms  and
                  conditions relating thereto;

         (17)     whether  any of such Debt  Securities  are to be  issuable  in
                  permanent  global form (a "Global  Security")  and, if so, the
                  terms and  conditions,  if any,  upon which  interests in such
                  Debt  Securities in global form may be exchanged,  in whole or
                  in  part,  for  the  individual  Debt  Securities  represented
                  thereby;

                                        3
<PAGE>




         (18)     the  applicability,  if any, of the  defeasance  and  covenant
                  defeasance  provisions  described  herein or any  modification
                  thereof;

         (19)     if such Debt  Securities are to be issued upon the exercise of
                  debt  warrants,  the  time,  manner  and  place  for such Debt
                  Securities to be authenticated and delivered;

         (20)     whether  and under what  circumstances  the  Company  will pay
                  additional  amounts on such Debt  Securities in respect of any
                  tax, assessment or governmental charge and, if so, whether the
                  Company will have the option to redeem such Debt Securities in
                  lieu of making such payment; and

         (21)     any other terms of such Debt Securities.

         The Debt  Securities  may  provide  for less than the entire  principal
amount thereof to be payable upon  declaration of  acceleration  of the maturity
thereof  ("Original  Issue  Discount  Securities").  If material or  applicable,
special U.S. federal income tax, accounting and other considerations  applicable
to Original  Issue  Discount  Securities  will be  described  in the  applicable
Prospectus Supplement.

         Except as described under  "--Merger,  Consolidation or Sale" or as may
be set forth in any  Prospectus  Supplement,  an Indenture  will not contain any
other  provisions  that  would  limit  the  ability  of  the  Company  to  incur
indebtedness or that would afford holders of the Debt  Securities  protection in
the event of a highly  leveraged or similar  transaction  involving the Company.
However, restrictions on ownership and transfers of the Company's capital stock,
designed to preserve its status as a REIT, may act to prevent or hinder a change
of  control.   See   "Redemption;   Business   Combinations  and  Control  Share
Acquisitions."  Reference is made to the  applicable  Prospectus  Supplement for
information with respect to any deletions from, modifications of or additions to
the events of default or  covenants  that are  described  below,  including  any
addition  of a  covenant  or other  provisions  providing  event risk or similar
protection.

Denominations, Interest, Registration and Transfer

         Unless otherwise described in the applicable Prospectus Supplement, the
Debt  Securities  of any  series  which are  registered  securities,  other than
registered  securities issued in global form (which may be of any denomination),
shall be issuable in denominations of $1,000 and any integral multiple thereof.

         Unless otherwise specified in the applicable Prospectus Supplement, the
principal of (and premium, if any) and interest on any series of Debt Securities
will  be  payable  at the  corporate  trust  office  of the  Indenture  Trustee,
initially at the address  which will be set forth in the  applicable  Prospectus
Supplement; provided that, at the option of the Company, payment of interest may
be made by check  mailed to the  address  of the person  entitled  thereto as it
appears in the  applicable  register or by wire transfer of funds to such person
at an account maintained within the United States.

         Any interest not  punctually  paid or duly provided for on any interest
payment  date  with  respect  to a Debt  Security  ("Defaulted  Interest")  will
forthwith  cease to be payable to the holder on the  applicable  regular  record
date and may either be paid to the person in whose  name such Debt  Security  is
registered  at the close of  business  on a special  record  date (the  "Special
Record  Date") for the  payment of such  Defaulted  Interest  to be fixed by the
applicable  Indenture  Trustee,  notice  whereof shall be given to the holder of
such Debt  Security not less than 10 days prior to such Special  Record Date, or
may be paid at any  time in any  other  lawful  manner,  all as more  completely
described in the applicable Indenture.

         Subject to certain  limitations  imposed upon Debt Securities issued in
book-entry  form,  the Debt  Securities of any series will be  exchangeable  for
other Debt Securities of the same series and of a like aggregate principal

                                        4

<PAGE>



amount and tenor of different  authorized  denominations  upon surrender of such
Debt  Securities  at the  corporate  trust  office of the  applicable  Indenture
Trustee.  In  addition,   subject  to  certain  limitations  imposed  upon  Debt
Securities  issued in book-entry  form, the Debt Securities of any series may be
surrendered for conversion or registration of transfer  thereof at the corporate
trust  office  of  the  applicable   Indenture  Trustee.   Every  Debt  Security
surrendered for  conversion,  registration of transfer or exchange shall be duly
endorsed or accompanied by a written  instrument of transfer.  No service charge
will  be  made  for  any  registration  of  transfer  or  exchange  of any  Debt
Securities,  but the Indenture  Trustee or the Company may require  payment of a
sum  sufficient  to  cover  any tax or  other  governmental  charge  payable  in
connection  therewith.  If the applicable  Prospectus  Supplement  refers to any
transfer agent (in addition to the Indenture  Trustee)  initially  designated by
the Company  with respect to any series of Debt  Securities,  the Company may at
any time rescind the  designation of any such transfer agent or approve a change
in the location  through  which any such  transfer  agent acts,  except that the
Company  will be required to maintain a transfer  agent in each place of payment
for such  series.  The Company  may at any time  designate  additional  transfer
agents with respect to any series of Debt Securities.

         Neither the Company nor any Indenture  Trustee shall be required to (i)
issue, register the transfer of or exchange Debt Securities of any series during
a period  beginning  at the opening of business 15 days before any  selection of
Debt  Securities  of that  series  to be  redeemed  and  ending  at the close of
business  on (a) if  such  Debt  Securities  are  issuable  only  as  registered
securities,  the day of the mailing of the relevant notice of redemption and (b)
if such Debt Securities are issuable as bearer securities,  the day of the first
publication of the relevant notice of redemption or, if such Debt Securities are
also issuable as registered securities and there is no publication,  the mailing
of the  relevant  notice of  redemption,  or (ii) to register the transfer of or
exchange any registered security so selected for redemption in whole or in part,
except,  in the case of any  registered  security to be  redeemed  in part,  the
portion thereof not to be redeemed,  or (iii) to exchange any bearer security so
selected for redemption  except that such a bearer security may be exchanged for
a  registered  security  of that  series  and like  tenor;  provided  that  such
registered security shall be simultaneously  surrendered for redemption, or (iv)
to issue,  register the transfer of or exchange any Debt Security which has been
surrendered  for repayment at the option of the holder,  except the portion,  if
any, of such Debt Security not to be so repaid.

Merger, Consolidation or Sale

         The  Company  may  consolidate  with,  or sell,  lease or convey all or
substantially  all of its assets to, or merge  with or into,  any other  entity;
provided  that (i)  either the  Company  shall be the  continuing  entity or the
successor  entity (if other than the Company)  formed by or  resulting  from any
such  consolidation  or merger or which shall have received the transfer of such
assets shall expressly assume payment of the principal of (and premium,  if any)
and interest on all of the Debt Securities and the due and punctual  performance
and  observance  of  all  of  the  covenants  and  conditions  contained  in any
Indenture; (ii) immediately after giving effect to such transaction and treating
any indebtedness which becomes an obligation of the Company or any subsidiary as
a result  thereof as having been  incurred by the Company or such  subsidiary at
the time of such  transaction,  no event of default under any Indenture,  and no
event which,  after notice or the lapse of time,  or both,  would become such an
event of default, shall have occurred and be continuing;  and (iii) an officer's
certificate and legal opinion covering such conditions shall be delivered to the
Indenture Trustee.

Certain Covenants

         Existence. Except as permitted under "--Merger, Consolidation or Sale,"
the Company  will be required to do or cause to be done all things  necessary to
preserve  and keep in full  force and  effect its  corporate  existence,  rights
(charter and  statutory) and  franchises;  provided,  however,  that the Company
shall not be required to preserve any right or franchise if it  determines  that
the preservation thereof is no longer desirable in the conduct of its business.

         Provision  of  Financial  Information.  Whether  or not the  Company is
subject to Section 13 or 15(d) of the  Exchange  Act, the Company  will,  to the
extent permitted under the Exchange Act, file with the Commission the

                                        5

<PAGE>

annual  reports,  quarterly  reports and other documents which the Company would
have been  required to file with the  Commission  pursuant to such Section 13 or
15(d)  (the  "Financial  Statements")  if the  Company  were  so  subject,  such
documents to be filed with the  Commission on or prior to the  respective  dates
(the  "Required  Filing Dates") by which the Company would have been required so
to file such documents if the Company were so subject.  The Company will also in
any event (i) within 15 days of each  Required  Filing Date (a) transmit by mail
to all holders of Debt  Securities,  as their names and addresses  appear in the
Company's security register,  without cost to such holders, copies of the annual
reports and quarterly reports which the Company would have been required to file
with the  Commission  pursuant to Section 13 or 15(d) of the Exchange Act if the
Company  were  subject  to such  Sections,  and (b)  file  with  the  applicable
Indenture  Trustee  copies of the annual  reports,  quarterly  reports and other
documents which the Company would have been required to file with the Commission
pursuant to Section 13 or 15(d) of the  Exchange Act if the Company were subject
to such  Sections,  and (ii) if filing such  documents  by the Company  with the
Commission  is not  permitted  under the  Exchange  Act,  promptly  upon written
request and payment of the reasonable cost of duplication  and delivery,  supply
copies of such documents to any prospective holder of Debt Securities.

         Additional  Covenants.  Any  additional  or different  covenants of the
Company with respect to any series of Debt  Securities  will be set forth in the
applicable Prospectus Supplement.

Events of Default, Notice and Waiver

         Each  Indenture  will provide that the following  events are "Events of
Default" with respect to any series of Debt Securities  issued  thereunder;  (a)
default for 30 days in the payment of any  installment  on any Debt  Security of
such series; (b) default in the payment of the principal of (or premium, if any,
on) any Debt Security of such series at its maturity;  (c) default in making any
sinking  fund  payments as required for any Debt  Security of such  series;  (d)
default in the performance of any other covenant of the Company contained in the
applicable  Indenture  (other than a covenant added to such Indenture solely for
the benefit of a series of Debt  Securities  issued  thereunder  other than such
series),  such default  having  continued  for 60 days after  written  notice as
provided in such Indenture; (e) default in the payment of an aggregate principal
amount  exceeding a specified  dollar amount of any evidence of  indebtedness of
the Company or any  mortgage,  indenture  or other  instrument  under which such
indebtedness is issued or by which such  indebtedness  is secured,  such default
having  occurred after the expiration of any applicable  grace period and having
resulted in the acceleration of the maturity of such  indebtedness,  but only if
such  indebtedness  is not discharged or such  acceleration  is not rescinded or
annulled;  (f) certain events of bankruptcy,  insolvency or  reorganization,  or
court  appointment  of a receiver,  liquidator  or trustee of the Company or any
Significant  Subsidiary  (as  hereinafter  defined)  or any of their  respective
property;  and (g) any  other  event  of  default  provided  with  respect  to a
particular series of Debt Securities.  The term  "Significant  Subsidiary" means
each significant  subsidiary (as defined in Regulation S-X promulgated under the
Securities Act) of the Company.

         If an Event of Default  (other  than an Event of Default  described  in
clause (f) above) under any  Indenture  with respect to Debt  Securities  of any
series at the time outstanding occurs and is continuing, then in every such case
the applicable  Indenture  Trustee or the holders of not less than a majority in
principal  amount of the outstanding  Debt Securities of that series may declare
the  principal  amount (or, if the Debt  Securities  of that series are Original
Issue Discount Securities or indexed  securities,  such portion of the principal
amount as may be specified in the terms  thereof) of all of the Debt  Securities
of that series to be due and payable  immediately  by written  notice thereof to
the Company (and to the applicable  Indenture  Trustee if given by the holders).
If an Event of Default  described  in clause (f) above with  respect to the Debt
Securities  of any series at the time  outstanding  shall occur,  the  principal
amount of all the Debt  Securities  of that  series (or, in the case of any such
Original Issue Discount Security or other Debt Security,  such specified amount)
will  automatically,  and  without  any action by the  Indenture  Trustee or any
holder of such series of Debt  Securities,  become  immediately due and payable.
However,  at any time after such a declaration of  acceleration  with respect to
Debt Securities of such series (or of all Debt Securities then outstanding under
the  applicable  Indenture,  as the  case may be) has been  made,  but  before a
judgment  or  decree  for  payment  of the money  due has been  obtained  by the
applicable  Indenture  Trustee,  the  holders  of not less  than a  majority  in
principal  amount of outstanding  Debt Securities of such series (or of all Debt
Securities then

                                        6

<PAGE>



outstanding under the applicable Indenture,  as the case may be) may rescind and
annul  such  declaration  and its  consequences  if (i) the  Company  shall have
deposited with the  applicable  Indenture  Trustee all required  payments of the
principal of (and premium,  if any) and interest on the Debt  Securities of such
series  (or of  all  Debt  Securities  then  outstanding  under  the  applicable
Indenture,  as the case may be), plus certain fees, expenses,  disbursements and
advances of the applicable  Indenture  Trustee,  and (ii) all Events of Default,
other than the  non-payment  of  accelerated  principal  (or  specified  portion
thereof),  or premium, if any, or interest on the Debt Securities of such series
(or of all Debt Securities then outstanding under the applicable  Indenture,  as
the  case may be) have  been  cured or  waived  as  provided  in the  applicable
Indenture. Each of the Indentures will also provide that the holders of not less
than a majority in principal  amount of the  outstanding  Debt Securities of any
series  (or of  all  Debt  Securities  then  outstanding  under  the  applicable
Indenture,  as the case may be) may waive any past  default with respect to such
series  and  its  consequences,  except  a  default  (i) in the  payment  of the
principal  of (or  premium,  if any) or  interest  on any Debt  Security of such
series or (ii) in respect of a covenant or provision contained in the applicable
Indenture  that cannot be modified or amended  without the consent of the holder
of each outstanding Debt Security affected thereby.

         The Indenture Trustee will be required to give notice to the holders of
Debt  Securities  within 90 days of a default  under  the  applicable  Indenture
unless  such  default  has been cured or waived;  provided,  however,  that such
Indenture  Trustee  may  withhold  notice to the  holders  of any series of Debt
Securities  of any default with respect to such series  (except a default in the
payment  of the  principal  of (or  premium,  if any) or  interest  on any  Debt
Security of such series or in the payment of any  sinking  fund  installment  in
respect of any Debt Security of such series) if specified  responsible  officers
of such  Indenture  Trustee  consider such  withholding to be in the interest of
such holders.

         Each Indenture  will provide that no holders of Debt  Securities of any
series may institute any proceedings, judicial or otherwise, with respect to the
Indenture  or for any  remedy  thereunder,  except in the case of failure of the
Indenture  Trustee,  for 60 days, to act after it has received a written request
to institute  proceedings  in respect of an event of default from the holders of
not less than a majority in principal  amount of the outstanding Debt Securities
of such series, as well as an offer of reasonable indemnity. This provision will
not prevent,  however,  any holder of Debt Securities from  instituting suit for
the  enforcement  of  payment  of the  principal  of (and  premium,  if any) and
interest on such Debt Securities at the respective due dates thereof.

         Subject to  provisions  in the  applicable  Indenture  relating  to its
duties in case of default,  no Indenture Trustee will be under any obligation to
exercise  any of its rights or powers  under such  Indenture  at the  request or
direction of any holders of any series of Debt Securities then outstanding under
such Indenture,  unless such holders shall have offered to the Indenture Trustee
reasonable  security  or  indemnity.  The holders of not less than a majority in
principal  amount of the  outstanding  Debt  Securities of any series (or of all
Debt Securities then outstanding under the applicable Indenture, as the case may
be) shall have the right to direct the time,  method and place of conducting any
proceeding for any remedy available to the applicable  Indenture Trustee,  or of
exercising any trust or power conferred upon such Indenture Trustee.  However, a
Indenture  Trustee may refuse to follow any direction  which is in conflict with
any law or the Indenture,  which may involve such Indenture  Trustee in personal
liability or which may be unduly  prejudicial to the holders of Debt  Securities
of such series not joining therein.

         The  Company  will be  required  to deliver to each  Indenture  Trustee
annually a  certificate,  signed by one of  several  specified  officers  of the
Company,  stating whether or not such officer has knowledge of any default under
the applicable Indenture and, if so, specifying each such default and the nature
and status thereof.

Modification of the Indenture

         Modifications  and  amendments of an Indenture  will be permitted to be
made  only with the  consent  of the  holders  of not less  than a  majority  in
principal  amount of all  outstanding  Debt  Securities or series of outstanding
Debt Securities which are affected by such modification or amendment;  provided,
however,  that no such modification or amendment may, without the consent of the
holder of each such Debt Security affected thereby, (i)

                                        7

<PAGE>



change the stated  maturity of the principal of, or any  installment of interest
(or premium, if any) on any such Debt Security; (ii) reduce the principal amount
of, or the rate or amount of interest on, or any premium  payable on  redemption
of, any such Debt  Security,  or reduce the amount of  principal  of an Original
Issue  Discount  Security  that would be due and  payable  upon  declaration  of
acceleration  of the  maturity  thereof or would be provable in  bankruptcy,  or
adversely affect any right of repayment of the holder of any such Debt Security;
(iii)  change the place of  payment,  or the coin or  currency,  for  payment of
principal  of,  premium,  if any, or interest  on any such Debt  Security;  (iv)
impair the right to institute suit for the enforcement of any payment on or with
respect to any such Debt  Security;  (v) reduce the  above-stated  percentage of
outstanding  Debt  Securities  of any  series  necessary  to modify or amend the
Indenture,  to waive  compliance  with  certain  provisions  thereof  or certain
defaults  and  consequences  thereunder  or  to  reduce  the  quorum  or  voting
requirements  set forth in such  Indenture;  or (vi) modify any of the foregoing
provisions  or any of the  provisions  relating  to the waiver of  certain  past
defaults or certain  covenants,  except to increase the required  percentage  to
effect  such  action or to provide  that  certain  other  provisions  may not be
modified or waived without the consent of the holder of such Debt Security.

         Each  Indenture  will  provide  that the  holders  of not  less  than a
majority in principal amount of a series of outstanding Debt Securities have the
right to waive compliance by the Company with certain covenants relating to such
series of Debt Securities in such Indenture.

         Modifications  and  amendments of an Indenture  will be permitted to be
made by the Company and the applicable  Indenture Trustee thereunder without the
consent of any holder of Debt Securities for any of the following purposes:  (i)
to evidence the  succession  of another  person to the Company as obligor  under
such  Indenture;  (ii) to add to the covenants of the Company for the benefit of
the holders of all or any series of Debt Securities or to surrender any right or
power  conferred  upon the  Company  in such  Indenture;  (iii) to add events of
default for the benefit of the holders of all or any series of Debt  Securities;
(iv) to add or change any provisions of the Indenture to facilitate the issuance
of, or to  liberalize  certain  terms of, Debt  Securities in bearer form, or to
permit or facilitate  the issuance of Debt  Securities in  uncertificated  form;
provided  that such  action  shall not  adversely  affect the  interests  of the
holders  of the Debt  Securities  in any  material  respect;  (v) to  change  or
eliminate  any  provisions  of the  Indenture;  provided that any such change or
elimination  shall  become  effective  only when  there  are no Debt  Securities
outstanding  of any series  created  prior  thereto  which are  entitled  to the
benefit  of such  provision;  (vi) to  secure  the  Debt  Securities;  (vii)  to
establish  the form or terms of Debt  Securities  of any series,  including  the
provisions  and  procedures,  if  applicable,  for the  conversion  of such Debt
Securities  into Common  Shares or Preferred  Shares;  (viii) to provide for the
acceptance of  appointment  by a successor  Indenture  Trustee or facilitate the
administration  of the  trusts  under an  Indenture  by more than one  Indenture
Trustee;  (ix) to cure any ambiguity,  defect or  inconsistency in an Indenture;
provided that such action shall not adversely affect the interests of holders of
Debt Securities of any series in any material respect;  or (x) to supplement any
of the  provisions  of an  Indenture  to  the  extent  necessary  to  permit  or
facilitate  defeasance  and  discharge  of any  series of such Debt  Securities;
provided  that such  action  shall not  adversely  affect the  interests  of the
holders of the Debt Securities of any series in any material respect.

         Each Indenture will provide that in determining  whether the holders of
the requisite  principal  amount of outstanding Debt Securities of a series have
given any request, demand,  authorization,  direction, notice, consent or waiver
thereunder  or  whether a quorum is  present  at a meeting  of  holders  of Debt
Securities, (i) the principal amount of an Original Issue Discount Security that
shall be deemed to be outstanding  shall be the amount of the principal  thereof
that  would  be due  and  payable  as of the  date of  such  determination  upon
declaration of acceleration of the maturity  thereof,  (ii) the principal amount
of a Debt  Security  denominated  in a  foreign  currency  that  shall be deemed
outstanding  shall be the U.S. dollar  equivalent,  determined on the issue date
for such Debt Security,  of the principal amount (or, in the case of an Original
Issue Discount  Security,  the U.S. dollar  equivalent on the issue date of such
Debt  Security of the amount  determined  as  provided in (i) above),  (iii) the
principal amount of an indexed security that shall be deemed  outstanding  shall
be the  principal  face amount of such  indexed  security at original  issuance,
unless  otherwise  provided  with  respect  to  such  indexed  security  in  the
applicable Indenture, and (iv) Debt Securities owned by the Company or any other
obligor  upon the Debt  Securities  or any  affiliate  of the Company or of such
other obligor shall be disregarded.

                                        8

<PAGE>



         Each  Indenture will contain  provisions for convening  meetings of the
holders of Debt  Securities of a series.  A meeting may be called at any time by
an Indenture Trustee,  and also, upon request,  by the Company or the holders of
at least 25% in principal  amount of the  outstanding  Debt  Securities  of such
series,  in any such case,  upon notice  given as  provided  in such  Indenture.
Except for any  consent  that must be given by the holder of each Debt  Security
affected by certain modifications and amendments of an Indenture, any resolution
presented at a meeting or adjourned meeting duly reconvened at which a quorum is
present may be adopted by the  affirmative  vote of the holders of a majority in
principal  amount of the outstanding  Debt Securities of that series;  provided,
however,  that,  except as referred to above, any resolution with respect to any
request,  demand,  authorization,  direction,  notice,  consent, waiver or other
action  that  may be  made,  given  or  taken  by  the  holders  of a  specified
percentage,  which  is  less  than  a  majority,  in  principal  amount  of  the
outstanding Debt Securities of a series may be adopted at a meeting or adjourned
meeting duly reconvened at which a quorum is present by the affirmative  vote of
the holders of such specified  percentage in principal amount of the outstanding
Debt Securities for that series.  Any resolution passed or decision taken at any
meeting of holders of Debt Securities of any series duly held in accordance with
the applicable  Indenture  will be binding on all holders of Debt  Securities of
that series. The quorum at any meeting called to adopt a resolution,  and at any
reconvened  meeting,  will be persons  holding  or  representing  a majority  in
principal  amount of the  outstanding  Debt  Securities  of a series;  provided,
however,  that if any action is to be taken at such  meeting  with  respect to a
consent or waiver which may be given by the holders of not less than a specified
percentage in principal  amount of the outstanding  Debt Securities of a series,
the persons  holding or  representing  such  specified  percentage  in principal
amount of the  outstanding  Debt  Securities  of such series will  constitute  a
quorum.

         Notwithstanding the foregoing  provisions,  each Indenture will provide
that if any action is to be taken at a meeting of holders of Debt  Securities of
any  series  with  respect to any  request,  demand,  authorization,  direction,
notice,  consent,  waiver or other action that such Indenture expressly provides
may be  made,  given  or taken by the  holders  of such  series  and one or more
additional  series:  (i) there shall be no minimum quorum  requirement  for such
meeting and (ii) the principal amount of the outstanding Debt Securities of such
series that vote in favor of such  request,  demand,  authorization,  direction,
notice,  consent,  waiver  or  other  action  shall  be taken  into  account  in
determining  whether such request,  demand,  authorization,  direction,  notice,
consent,  waiver  or other  action  has been  made,  given or taken  under  such
Indenture.

Discharge, Defeasance and Covenant Defeasance

         The Company may discharge certain  obligations to holders of any series
of Debt  Securities  that have not  already  been  delivered  to the  applicable
Indenture  Trustee for  cancellation and that either have become due and payable
or will  become due and payable  within one year (or  scheduled  for  redemption
within one year) by  irrevocably  depositing  with such  Indenture  Trustee,  in
trust, funds in such currency or currencies, currency unit or units or composite
currency or  currencies in which such Debt  Securities  are payable in an amount
sufficient to pay the entire  indebtedness on such Debt Securities in respect of
principal  (and  premium,  if any) and  interest to the date of such deposit (if
such Debt  Securities  have become due and payable) or to the stated maturity or
redemption date, as the case may be.

         An Indenture may provide that, if certain  provisions  thereof are made
applicable  to the  Debt  Securities  of or  within  a  series  pursuant  to the
Indenture,  the Company may elect either (i) to defease and be  discharged  from
any and all  obligations  with respect to such Debt  Securities  (except for the
obligation to pay  additional  amounts,  if any, upon the  occurrence of certain
events of tax,  assessment  or  governmental  charge with respect to payments on
such Debt Securities and the obligations to register the transfer or exchange of
such Debt  Securities,  to replace  temporary or mutilated,  destroyed,  lost or
stolen Debt Securities,  to maintain an office or agency in respect of such Debt
Securities and to hold moneys for payment in trust) ("defeasance") or (ii) to be
released from its obligations with respect to such Debt Securities under certain
sections  of  such  Indenture   (including  the  restrictions   described  under
"--Certain  Covenants")  and,  if  provided  pursuant  to  such  Indenture,  its
obligations with respect to any other covenant,  and any omission to comply with
such  obligations  shall not  constitute  a default or an event of default  with
respect to such Debt Securities ("covenant defeasance"), in either case upon the
irrevocable deposit by the Company

                                        9

<PAGE>



with the applicable  Indenture Trustee, in trust, of an amount, in such currency
or  currencies,  currency  unit or units of composite  currency or currencies in
which  such Debt  Securities  are  payable  at stated  maturity,  or  Government
Obligations  (as defined  below),  or both,  applicable to such Debt  Securities
which  through the scheduled  payment of principal  and interest,  in accordance
with their terms will provide money in an amount sufficient to pay the principal
of (and premium, if any) and interest on such Debt Securities, and any mandatory
sinking fund or analogous payments thereon, on the scheduled dates therefor.

         Such a trust  may be  established  only if,  among  other  things,  the
Company has delivered to the applicable  Indenture Trustee an opinion of counsel
(as  specified in the  applicable  Indenture)  to the effect that the holders of
such Debt Securities will not recognize  income,  gain or loss for U.S.  federal
income tax purposes as a result of such  defeasance or covenant  defeasance  and
will be subject to U.S.  federal  income  tax on the same  amounts,  in the same
manner and at the same times as would have been the case if such  defeasance  or
covenant defeasance had not occurred.

         "Government   Obligations"   means  securities  which  are  (i)  direct
obligations of the United States of America or the  government  which issued the
foreign  currency  in which  the Debt  Securities  of a  particular  series  are
payable,  for the  payment of which its full faith and credit is pledged or (ii)
obligations  of a person  controlled or supervised by and acting as an agency or
instrumentality  of the United States of America or such government which issued
the foreign  currency in which the Debt  Securities  of a particular  series are
payable, the payment of which is unconditionally  guaranteed as a full faith and
credit  obligation  by the United  States of  America or such other  government,
which,  in either  case,  are not  callable or  redeemable  at the option of the
issuer thereof,  and shall also include a depository receipt issued by a bank or
trust company as custodian with respect to any such  Government  Obligation or a
specific  payment of interest on or principal of any such Government  Obligation
held by such  custodian  for the account of the holder of a depository  receipt;
provided  that (except as required by law) such  custodian is not  authorized to
make any  deduction  from the amount  payable  to the holder of such  depository
receipt from any amount  received by the custodian in respect of the  Government
Obligations  or  the  specific  payment  of  interest  on or  principal  of  the
Government Obligations evidenced by such depository receipt.

         Unless otherwise provided in the applicable Prospectus  Supplement,  if
after the Company has deposited  funds and/or  Government  Obligations to effect
defeasance or covenant defeasance with respect to Debt Securities of any series,
(i) the holder of a Debt Security of such series is entitled to, and does, elect
pursuant  to the  applicable  Indenture  or the terms of such Debt  Security  to
receive  payment in a currency,  currency unit or composite  currency other than
that in which such  deposit has been made in respect of such Debt  Security,  or
(ii) a Conversion  Event (as defined  below)  occurs in respect of the currency,
currency  unit or composite  currency in which such  deposit has been made,  the
indebtedness represented by such Debt Security shall be deemed to have been, and
will be, fully discharged and satisfied  through the payment of the principal of
(and premium,  if any) and interest on such Debt Security as they become due out
of the proceeds yielded by converting the amount so deposited in respect of such
Debt Security into the  currency,  currency unit or composite  currency in which
such  Debt  Security  becomes  payable  as a  result  of such  election  or such
cessation of usage based on the applicable  market  exchange  rate.  "Conversion
Event" means the cessation of use of (i) a currency,  currency unit or composite
currency  both by the  government  of the country which issued such currency and
for  the  settlement  of   transactions  by  a  central  bank  or  other  public
institutions of or within the international banking community, (ii) the ECU both
within the European  Monetary  System and for the settlement of  transactions by
public institutions of or within the European  Communities or (iii) any currency
unit or composite  currency other than the ECU for the purposes for which it was
established.  Unless otherwise provided in the applicable Prospectus Supplement,
all  payments of  principal  of (and  premium,  if any) and interest on any Debt
Security  that is payable in a foreign  currency  that  ceases to be used by its
government of issuance shall be made in U.S. dollars.

         In the event the Company  effects  covenant  defeasance with respect to
any Debt  Securities  and such Debt  Securities  are  declared  due and  payable
because  of the  occurrence  of any  event of  default  other  than the event of
default  described in clause (d) under "--Events of Default,  Notice and Waiver"
with respect to certain  sections of the applicable  Indenture  (which  sections
would no longer be applicable to such Debt Securities) or described in

                                       10

<PAGE>



clause (g) under  "--Events  of Default,  Notice and Waiver" with respect to any
other  covenant as to which there has been  covenant  defeasance,  the amount in
such currency, currency unit or composite currency in which such Debt Securities
are payable,  and Government  Obligations  on deposit with the Trustee,  will be
sufficient  to pay  amounts  due on such  Debt  Securities  at the time of their
stated  maturity  but may not be  sufficient  to pay  amounts  due on such  Debt
Securities at the time of the acceleration resulting from such event of default.
However,  the Company would remain liable to make payment of such amounts due at
the time of acceleration.

         Notwithstanding  the  description  set  forth  under  "--Subordination"
below, in the event that the Company deposits money or Government Obligations in
compliance  with the applicable  Indenture in order to defease all or certain of
its  obligations  with  respect to any  Subordinated  Securities,  the moneys or
Government  Obligations  so deposited  will not be subject to the  subordination
provisions of such Indenture and the indebtedness evidenced by such Subordinated
Securities will not be subordinated in right of payment to the holders of senior
indebtedness to the extent of the moneys or Government Obligations so deposited.

         The  applicable   Prospectus   Supplement  may  further   describe  the
provisions, if any, permitting such defeasance or covenant defeasance, including
any  modifications to the provisions  described above,  with respect to the Debt
Securities of or within a particular series.

Conversion Rights

         The terms and  conditions,  if any, upon which the Debt  Securities are
convertible  into Common or Preferred Shares will be set forth in the Prospectus
Supplement  relating  thereto.   Such  terms  will  include  whether  such  Debt
Securities are convertible into Common or Preferred Shares, the conversion price
(or manner of  calculation  thereof),  the conversion  period,  provisions as to
whether  conversion  will be at the option of the  holders of the  Company,  the
events requiring an adjustment of the conversion price and provisions  affecting
conversion  in the  event of the  redemption  of such  Debt  Securities  and any
restrictions on conversion,  including  restrictions directed at maintaining the
Company's REIT status.

Subordination

         The terms and conditions, if any, upon which Subordinated Securities of
a  series  are  subordinated  to Debt  Securities  of other  series  or to other
indebtedness  of the  Company  will be set  forth in the  applicable  Prospectus
Supplement.  Such terms will include a description of the  indebtedness  ranking
senior to such  Subordinated  Securities,  the  restrictions  on payments to the
holders of such  Subordinated  Securities  while a default  with respect to such
senior indebtedness is continuing, the restrictions,  if any, on payments to the
holders of such  Subordinated  Securities  following  an Event of  Default,  and
provisions  requiring holders of such  Subordinated  Securities to remit certain
payments to holders of senior indebtedness.

Global Securities

         If so set  forth  in the  applicable  Prospectus  Supplement,  the Debt
Securities  of a series  may be issued in whole or in part in the form of one or
more  Global  Securities  that  will be  deposited  with,  or on  behalf  of,  a
depositary  identified in the applicable  Prospectus Supplement relating to such
series.  Global Securities may be issued in either registered or bearer form and
in either  temporary or permanent  form.  The specific  terms of the  depositary
arrangement with respect to any such series of Debt Securities will be described
in the applicable Prospectus Supplement.




                                       11

<PAGE>



                              DESCRIPTION OF SHARES

                  The  Declaration  of  Trust  ("Declaration")   authorizes  the
Company to issue an  aggregate  of  175,000,000  shares of  beneficial  interest
("Shares") in the Company,  including (i) 125,000,000  Common Shares,  par value
$.01 per share, and (ii) 50,000,000  Preferred Shares, par value $.01 per share.
The  Declaration  permits the Trustees to amend the  Declaration  to increase or
decrease  the  authorized  Shares of the  Company  without  the  requirement  of
shareholder approval.

         The Declaration authorizes the Trustees,  without shareholder approval,
from time to time to divide the  Preferred  Shares into classes or series and to
set (or change, if the class or series has been previously  established) the par
value,  if  any,  preferences,   conversion  or  other  rights,  voting  powers,
restrictions,   limitations  as  to  dividends,   qualifications  or  terms  and
conditions of redemption of such  Preferred  Shares as are not prohibited by the
Declaration or applicable  law. In connection with the adoption of the Company's
shareholders  rights plan (see  "Redemption;  Business  Combinations and Control
Share  Acquisitions  --  Rights  Plan,"  below),  the  Trustees  established  an
authorized but unissued class of 1,250,000  Preferred Shares, par value $.01 per
share (the "Junior Participating Preferred Shares"),  described more fully below
under  "Description  of  Preferred  Shares  --  Junior  Participating  Preferred
Shares," and as of May 1, 1997 no other class or series of Preferred  Shares had
been established.

         As of May 1, 1997  there were  98,703,918  Shares  outstanding,  all of
which were Common  Shares.  The  Company  also had  outstanding  as of such date
$211.7 million aggregate principal amount convertible subordinated debentures of
various series,  all of which are convertible  into Common Shares at an exercise
price  equal on such date to $18 per  share.  See  "Description  of  Convertible
Subordinated Debentures."

         The  following  descriptions  do not  purport  to be  complete  and are
subject to, and  qualified in their  entirety by reference to, the more complete
descriptions thereof set forth in the Declaration. Capitalized terms not defined
herein are as defined in the Declaration.

         Except as  otherwise  determined  by the  Trustees  with respect to any
class or series of Preferred Shares, all Shares: (i) will participate equally in
dividends  payable to shareholders  when, as and if declared by the Trustees and
ratably in net assets  available for distribution to shareholders on liquidation
or dissolution;  (ii) will have one vote per share on all matters submitted to a
vote of the  shareholders,  (iii) will not have cumulative  voting rights in the
election of Trustees;  and (iv) will have no preference,  conversion,  exchange,
sinking fund, redemption rights or preemptive or similar rights.

         Upon issuance in accordance  with the  Declaration,  applicable law and
the terms and conditions  described in the related  Prospectus  Supplement,  the
Shares will be fully paid and  nonassessable.  The holders of Shares do not have
preemptive  rights with  respect to the issuance of  additional  Shares or other
securities of the Company.

         The authorized but unissued  Shares will be available for issuance from
time to time by the  Company  at the sole  discretion  of the  Trustees  for any
proper  trust  purpose,   which  could  include   raising   capital,   providing
compensation  or benefits to employees  and others,  paying  stock  dividends or
acquiring  companies,  businesses or  properties.  The issuance of such unissued
Shares  could have the effect of diluting  the earnings per share and book value
per share of currently outstanding Shares.

         For  certain  other  information  with  respect  to  the  Shares,   see
"Limitation of Liabilities;  Shareholder  Liability" and  "Redemption;  Business
Combinations and Control Share Acquisitions" below.



                                       12

<PAGE>



                         DESCRIPTION OF PREFERRED SHARES

         The Declaration authorizes the Trustees,  without shareholder approval,
from time to time to divide the  Preferred  Shares into classes or series and to
set (or change, if the class or series has been previously  established) the par
value,  if  any,  preferences,   conversion  or  other  rights,  voting  powers,
restrictions,   limitations  as  to  dividends,   qualifications  or  terms  and
conditions of redemption of such Preferred Shares that are not prohibited by the
Declaration or applicable law.

         The following  description  of the Preferred  Shares sets forth certain
general terms and  provisions of the  Preferred  Shares to which any  Prospectus
Supplement  may relate and a brief  summary  of certain  terms of the  Company's
Junior  Participating  Preferred  Shares.  The statements  below  describing the
Preferred  Shares are in all respects subject to and qualified in their entirety
by reference to the  applicable  provisions of the  Declaration  (including  any
applicable articles supplementary) and By-Laws.

General

         Subject to limitations  prescribed by Maryland law and the Declaration,
the Trustees are authorized to fix the number of shares constituting each series
of Preferred Shares and the  designations and powers,  preferences and relative,
participating, optional or other specific rights and qualifications, limitations
or restrictions thereof,  including such provisions as may be desired concerning
voting,  redemption,  dividends,  dissolution  or the  distribution  of  assets,
conversion  or exchange,  and such other  subjects or matters as may be fixed by
resolutions of the Trustees.

         Reference  is  made  to  the  Prospectus  Supplement  relating  to  the
Preferred Shares offered thereby for specific terms, including:

         (1)      the title of such Preferred Shares;

         (2)      the number of shares of such Preferred Shares offered, the par
                  value,  the liquidation  preference per share and the offering
                  price of such Preferred Shares;

         (3)      the dividend  rate(s),  period(s)  and/or  payment  date(s) or
                  method(s) of calculation  thereof applicable to such Preferred
                  Shares;

         (4)      the date from which  dividends on such Preferred  Shares shall
                  accumulate, if applicable;

         (5)      the  procedures for any auction and  remarketing,  if any, for
                  such Preferred Shares;

         (6)      the provision  for a sinking fund, if any, for such  Preferred
                  Shares;

         (7)      the provision for redemption, if applicable, of such Preferred
                  Shares;

         (8)      any  listing  of  such  Preferred  Shares  on  any  securities
                  exchange;

         (9)      the terms and  conditions,  if  applicable,  upon  which  such
                  Preferred Shares will be convertible into Common Shares of the
                  Company or another series of Offered Securities, including the
                  conversion price (or manner of calculation thereof);

         (10)     whether interests in such Preferred Shares will be represented
                  by  Depositary  Shares as more  fully  described  below  under
                  "Description of Depositary Shares";

         (11)     any other specific terms, preferences,  rights, limitations or
                  restrictions of such Preferred Shares;


                                       13

<PAGE>



         (12)     a discussion of federal income tax  considerations  applicable
                  to such Preferred Shares;

         (13)     the relative  ranking and preferences of such Preferred Shares
                  as to dividend rights and rights upon liquidation, dissolution
                  or winding up of the affairs of the Company;

         (14)     any limitations on issuance of any series of Preferred  Shares
                  ranking senior to or on a parity with such series of Preferred
                  Shares as to  dividend  rights  and rights  upon  liquidation,
                  dissolution or winding up of the affairs of the Company; and

         (15)     any   limitations  on  direct  or  beneficial   ownership  and
                  restrictions on transfer.

         As described under "Description of Depositary Shares," the Company may,
at its option, elect to offer Depositary Shares evidenced by depositary receipts
("Depositary  Receipts"),   each  representing  a  fractional  interest  (to  be
specified in the Prospectus  Supplement relating to the particular series of the
Preferred  Shares) in a share of the particular  series of the Preferred  Shares
issued and deposited with a Depositary (as defined below).

Rank

         Unless  otherwise  determined  by the  Trustees  and  specified  in the
applicable Prospectus Supplement, it is expected that the Preferred Shares will,
with  respect to dividend  rights and rights upon  liquidation,  dissolution  or
winding up of the  Company,  rank (i) senior to all  Common  Shares,  and to all
equity securities ranking junior to such Preferred Shares; (ii) on a parity with
all equity  securities  issued by the  Company  the terms of which  specifically
provide that such equity  securities rank on a parity with the Preferred Shares;
and (iii)  junior to all equity  securities  issued by the  Company the terms of
which  specifically  provide  that such  equity  securities  rank  senior to the
Preferred Shares.

Dividends

         Holders  of  Preferred  Shares  of each  series  shall be  entitled  to
receive,  when, as and if declared by the Trustees, out of assets of the Company
legally available for payment, cash dividends at such rates and on such dates as
will be set forth in the applicable  Prospectus  Supplement.  Each such dividend
shall be payable to holders of record as they appear on the stock transfer books
of the Company (or, if applicable,  on the records of the Depositary referred to
below under "Description of Depositary Shares") on such record dates as shall be
fixed by the Trustees.

         Dividends on any series of the  Preferred  Shares may be  cumulative or
noncumulative,  as provided in the applicable Prospectus Supplement.  Dividends,
if  cumulative,  will be  cumulative  from and  after  the date set forth in the
applicable  Prospectus  Supplement.  If the Trustees  fail to declare a dividend
payable on a dividend  payment  date on any series of the  Preferred  Shares for
which  dividends  are  noncumulative,  then the  holders  of such  series of the
Preferred  Shares  will have no right to  receive a  dividend  in respect of the
dividend period ending on such dividend  payment date, and the Company will have
no  obligation  to pay the  dividend  accrued  for such  period,  whether or not
dividends on such series are  declared  payable on any future  dividend  payment
date.

         If Preferred  Shares of any series are  outstanding,  no full dividends
shall be declared or paid or set apart for  payment on the  Preferred  Shares of
the Company of any other series  ranking,  as to dividends,  on a parity with or
junior to the Preferred  Shares of such series for any period unless (i) if such
series of Preferred Shares has a cumulative dividend,  full cumulative dividends
have been or  contemporaneously  are  declared  and paid or  declared  and a sum
sufficient  for the payment  thereof set apart for such payment on the Preferred
Shares  of such  series  for all past  dividend  periods  and the  then  current
dividend  period or (ii) if such  series  of  Preferred  Shares  does not have a
cumulative  dividend,  full dividends for the then current  dividend period have
been or contemporaneously are declared and paid or declared and a sum sufficient
for the payment  thereof set apart for such payment on the  Preferred  Shares of
such series.  When  dividends are not paid in full (or a sum sufficient for such
full payment is

                                       14

<PAGE>



not so set apart) upon the Preferred  Shares of any series and the shares of any
other series of Preferred  Shares  ranking on a parity as to dividends  with the
Preferred Shares of such series, all dividends declared upon Preferred Shares of
such series and any other series of Preferred  Shares shall in all cases bear to
each other the same  ratio that  accrued  dividends  per share on the  Preferred
Shares of such series  (which shall not include any  accumulation  in respect of
unpaid dividends for prior dividend periods if such Preferred Shares do not have
a cumulative  dividend)  and such other series of Preferred  Shares bear to each
other.  No interest,  or sum of money in lieu of  interest,  shall be payable in
respect of any dividend  payment or payments on Preferred  Shares of such series
which may be in arrears.

         Except as provided in the immediately  preceding paragraph,  unless (i)
if such series of Preferred  Shares has a cumulative  dividend,  full cumulative
dividends on the Preferred Shares of such series have been or  contemporaneously
are declared and paid or declared and a sum sufficient for the repayment thereof
set  apart  for  payment  for all past  dividend  periods  and the then  current
dividend  period,  and (ii) if such series of  Preferred  Shares does not have a
cumulative dividend,  full dividends on the Preferred Shares of such series have
been or contemporaneously are declared and paid or declared and a sum sufficient
for the payment  thereof set apart for  payment  for the then  current  dividend
period, no dividends (other than in Common Shares or other capital stock ranking
junior  to the  Preferred  Shares  of  such  series  as to  dividends  and  upon
liquidation)  shall  be  declared  or paid or set  aside  for  payment  or other
distribution  shall be  declared  or made  upon the  Common  Shares or any other
capital stock of the Company ranking junior to or on a parity with the Preferred
Shares of such series as to dividends or upon liquidation,  nor shall any Common
Shares or any  other  capital  stock of the  Company  ranking  junior to or on a
parity  with  the  Preferred  Shares  of such  series  as to  dividends  or upon
liquidation be redeemed,  purchased or otherwise  acquired for any consideration
(or any  moneys  be  paid  to or  made  available  for a  sinking  fund  for the
redemption of any shares of any such stock) by the Company (except by conversion
into or exchange for other  capital stock of the Company  ranking  junior to the
Preferred  Shares of such series as to dividends and upon liquidation and except
pursuant to certain pro rata offers to purchase or a  concurrent  redemption  of
all, or a pro rata portion of, the outstanding shares of the Preferred Shares of
such series and any other  series of Preferred  Shares  ranking on a parity with
such series as to dividends and liquidation).

         Any dividend  payment  made on shares of a series of  Preferred  Shares
shall first be credited  against the  earliest  accrued but unpaid  dividend due
with respect to shares of such series which remains payable.

Redemption

         If so provided in the applicable Prospectus  Supplement,  the Preferred
Shares will be subject to mandatory  redemption  or  redemption at the option of
the Company,  as a whole or in part,  in each case upon the terms,  at the times
and at the redemption prices set forth in such Prospectus Supplement.

         The Prospectus Supplement relating to a series of Preferred Shares that
is subject to mandatory  redemption  will  specify the number of such  Preferred
Shares that shall be redeemed  by the  Company in each year  commencing  after a
date to be specified, at a redemption price per share to be specified,  together
with an amount equal to all accrued and unpaid  dividends  thereon  (which shall
not, if such  Preferred  Shares do not have a cumulative  dividend,  include any
accumulation in respect of unpaid  dividends for prior dividend  periods) to the
date of  redemption.  The  redemption  price  may be  payable  in cash or  other
property,  as  specified  in  the  applicable  Prospectus  Supplement.   If  the
redemption price for Preferred Shares of any series is payable only from the net
proceeds of the  issuance  of capital  stock of the  Company,  the terms of such
Preferred  Shares may provide  that,  if no such  capital  stock shall have been
issued or to the extent the net proceeds from any issuance are  insufficient  to
pay in full the aggregate redemption price then due, such Preferred Shares shall
automatically and mandatorily be converted into shares of the applicable capital
stock  of  the  Company  pursuant  to  conversion  provisions  specified  in the
applicable Prospectus Supplement.

         Notwithstanding  the foregoing,  unless (i) if such series of Preferred
Shares has a cumulative dividend, full cumulative dividends on all shares of any
series of Preferred Shares shall have been or contemporaneously are

                                       15

<PAGE>

declared and paid or declared and a sum sufficient  for the payment  thereof set
apart for payment for all past  dividend  periods and the then current  dividend
period,  and (ii) if such series of Preferred  Shares does not have a cumulative
dividend,  full  dividends  on the  Preferred  Shares of any series have been or
contemporaneously are declared and paid or declared and a sum sufficient for the
payment thereof set apart for payment for the then current dividend  period,  no
shares  of  any  series  of  Preferred  Shares  shall  be  redeemed  unless  all
outstanding  Preferred  Shares  of  such  series  are  simultaneously  redeemed;
provided,  however,  that the  foregoing  shall  not  prevent  the  purchase  or
acquisition  of  Preferred  Shares of such  series  pursuant  to a  purchase  or
exchange  offer made on the same terms to holders of all  outstanding  Preferred
Shares of such series,  and, unless (i) if such series of Preferred Shares has a
cumulative dividend,  full cumulative dividends on all outstanding shares of any
series of Preferred Shares have been or contemporaneously  are declared and paid
or declared and a sum sufficient  for the payment  thereof set apart for payment
for all past dividend periods and the then current dividend period,  and (ii) if
such  series of  Preferred  Shares  does not have a  cumulative  dividend,  full
dividends on the Preferred  Shares of any series have been or  contemporaneously
are declared and paid or declared and a sum sufficient  for the payment  thereof
set apart for payment for the then current  dividend  period,  the Company shall
not purchase or otherwise acquire directly or indirectly any Preferred Shares of
such series  (except by  conversion  into or exchange  for capital  stock of the
Company  ranking  junior to the Preferred  Shares of such series as to dividends
and upon liquidation).

         If fewer than all of the outstanding Preferred Shares of any series are
to be redeemed, the number of Preferred Shares to be redeemed will be determined
by the  Company  and such  shares may be  redeemed  pro rata from the holders of
record of such  shares in  proportion  to the number of such shares held by such
holders (with adjustments to avoid redemption of fractional shares) or by lot in
manner determined by the Company.

         Notice of redemption  will be mailed at least 30 days but not more than
60 days before the redemption date to each holder of record of Preferred  Shares
of any series to be redeemed at the address shown on the stock transfer books of
the Company.  Each notice shall state:  (i) the redemption date; (ii) the number
of  shares  and  series  of the  Preferred  Shares  to be  redeemed;  (iii)  the
redemption price; (iv) the place or places where certificates for such Preferred
Shares are to be  surrendered  for  payment of the  redemption  price;  (v) that
dividends on the shares to be redeemed  will cease to accrue on such  redemption
date; and (vi) the date upon which the holder's conversion rights, if any, as to
such  shares  shall  terminate.  If fewer than all the  Preferred  Shares of any
series are to be redeemed,  the notice mailed to each such holder  thereof shall
also  specify  the  number of  Preferred  Shares to be  redeemed  from each such
holder.  If notice of redemption  of any Preferred  Shares has been given and if
the funds  necessary for such  redemption  have been set aside by the Company in
trust for the  benefit of the holders of any of the  Preferred  Shares so called
for redemption,  then from and after the redemption date dividends will cease to
accrue on such Preferred  Shares,  and any and all rights of the holders of such
shares will terminate, except the right to receive the redemption price.

Liquidation Preference

         Upon any voluntary or involuntary  liquidation,  dissolution or winding
up of the affairs of the Company, then, before any distribution or payment shall
be made to the  holders  of any  Common  Shares or any other  class or series of
capital  stock of the  Company  ranking  junior to the  Preferred  Shares in the
distribution  of assets upon any  liquidation,  dissolution or winding up of the
Company,  the holders of each series of  Preferred  Shares  shall be entitled to
receive out of assets of the  Company  legally  available  for  distribution  to
shareholders  liquidating   distributions  in  the  amount  of  the  liquidation
preference per share (set forth in the applicable Prospectus  Supplement),  plus
an amount equal to all  dividends  accrued and unpaid  thereon  (which shall not
include  any  accumulation  in respect of unpaid  dividends  for prior  dividend
periods  if such  Preferred  Shares do not have a  cumulative  dividend).  After
payment of the full amount of the  liquidating  distributions  to which they are
entitled,  the holders of Preferred Shares will have no right or claim to any of
the remaining  assets of the Company.  In the event that upon any such voluntary
or involuntary  liquidation,  dissolution or winding up, the available assets of
the Company are insufficient to pay the amount of the liquidating  distributions
on all outstanding Preferred Shares and the corresponding amounts payable on all
shares of other classes or series of capital  stock of the Company  ranking on a
parity with the Preferred Shares in the distribution of assets, then the holders
of the Preferred Shares and all

                                       16

<PAGE>



other such  classes or series of capital  stock shall share  ratably in any such
distribution of assets in proportion to the full  liquidating  distributions  to
which they would otherwise be respectively entitled.

         If  liquidating  distributions  shall  have  been  made  in full to all
holders of  Preferred  Shares,  the  remaining  assets of the  Company  shall be
distributed  among the holders of any other  classes or series of capital  stock
ranking junior to the Preferred Shares upon liquidation,  dissolution or winding
up,  according  to their  respective  rights  and  preferences  and in each case
according  to  their  respective  number  of  shares.  For  such  purposes,  the
consolidation  or  merger  of the  Company  with  or into  any  other  trust  or
corporation, or the sale, lease or conveyance of all or substantially all of the
property  or  business  of the  Company,  shall not be deemed  to  constitute  a
liquidation, dissolution or winding up of the Company.

Voting Rights

         Holders of the Preferred Shares will not have any voting rights, except
as set  forth  below or as  otherwise  from time to time  required  by law or as
indicated in the applicable Prospectus Supplement.

         Unless otherwise specified in the related Prospectus Supplement, at any
time dividends on any Preferred  Shares shall be in arrears for six  consecutive
quarterly periods,  the holders of such Preferred Shares (voting separately as a
class with all other  series of preferred  shares upon which like voting  rights
have  been  conferred  and are  exercisable)  will be  entitled  to vote for the
election of two additional trustees of the Company at the next annual meeting of
shareholders  and at  each  subsequent  meeting  until  (i) if  such  series  of
Preferred Shares has a cumulative  dividend,  all dividends  accumulated on such
Preferred  Shares for the past  dividend  periods and the then current  dividend
period  shall have been  fully paid or  declared  and a sum  sufficient  for the
payment thereof set aside for payment or (ii) if such series of Preferred Shares
does not have a cumulative dividend,  four consecutive quarterly dividends shall
have been fully paid or declared and a sum  sufficient  for the payment  thereof
set aside for payment.  In such case, the entire Trustees of the Company will be
increased by two trustees.

         Unless provided  otherwise for any series of Preferred  Shares, so long
as any Preferred Shares remain  outstanding,  the Company shall not, without the
affirmative  vote or consent of the  holders of a majority of the shares of each
series of Preferred Shares outstanding at the time, given in person or by proxy,
either in writing or at a meeting  (such series  voting  separately as a class),
(i)  authorize or create,  or increase the  authorized  or issued amount of, any
class or series of  capital  stock  ranking  prior to such  series of  Preferred
Shares with respect to payment of dividends or the  distribution  of assets upon
liquidation,  dissolution or winding up, or reclassify  any  authorized  capital
stock of the Company  into any such  shares,  or create,  authorize or issue any
obligation or security  convertible into or evidencing the right to purchase any
such shares; or (ii) amend, alter or repeal the provisions of the Declaration or
the certificate of designations for such series of Preferred Shares,  whether by
merger, consolidation or otherwise, so as to materially and adversely affect any
right, preference,  privilege or voting power of such series of Preferred Shares
or the holders thereof;  provided,  however,  that any increase in the amount of
the authorized  Preferred Shares or the creation or issuance of any other series
of Preferred  Shares, or any increase in the amount of authorized shares of such
series or any other series of Preferred Shares, in each case ranking on a parity
with or junior to the Preferred Shares of such series with respect to payment of
dividends or the distribution of assets upon liquidation, dissolution or winding
up,  shall  not be  deemed to  materially  and  adversely  affect  such  rights,
preferences, privileges or voting powers.

         The foregoing  voting  provisions will not apply if, at or prior to the
time when the act with  respect to which such vote would  otherwise  be required
shall be effected,  all  outstanding  shares of such series of Preferred  Shares
shall have been redeemed or called for  redemption  and  sufficient  funds shall
have been deposited in trust to effect such redemption.

         As more fully described under "Description of Depositary Shares" below,
if the Company elects to issue Depositary  Shares,  each representing a fraction
of share of a series of the  Preferred  Shares,  each such  Depositary  will, in
effect be entitled to such fraction of a vote per Depositary Share.

                                       17

<PAGE>



Conversion Rights

         The terms and  conditions,  if any,  upon which shares of any series of
Preferred Shares may be converted into or exchanged for Common Shares or another
series of  Preferred  Shares or other series of Offered  Securities  will be set
forth in the Prospectus Supplement relating thereto. Such terms will include the
number of Common Shares or other  securities  into which the Preferred  Share is
convertible  or  exchangeable,  conversion  or  exchange  price  (or  manner  of
calculation  thereof),  the  conversion  or exchange  period,  provisions  as to
whether  conversion  or  exchange  will be at the  option of the  holders of the
Preferred  Shares or the  Company,  the events  requiring an  adjustment  of the
conversion or exchange price and provisions  affecting conversion or exchange in
the event of the redemption such Preferred Shares.

Junior Participating Preferred Shares

         In connection  with the adoption of the Company's  shareholders  rights
plan,  the Trustees  established  an authorized  but unissued class of 1,250,000
Preferred  Shares.  See  "Redemption;  Business  Combinations  and Control Share
Acquisitions"  below.  Certain  powers,   preferences  and  rights  and  certain
qualifications,   limitations  and  restrictions  of  the  Junior  Participating
Preferred Shares, when and if issued, are as follows.  The statements below with
respect to the Junior Participating Preferred Shares are in all respects subject
to and qualified in their entirety by reference to the applicable  provisions of
the Declaration (including the applicable articles supplementary) and By-Laws.

         The holder of each Junior Participating  Preferred Share is entitled to
quarterly  dividends in the greater  amount of $5.00 or 100 times the  quarterly
per share dividend, whether cash or otherwise,  declared upon the Common Shares.
Dividends on the Junior Participating Preferred Shares are cumulative.  Whenever
dividends  on the Junior  Participating  Preferred  Shares are in  arrears,  the
Company,  among other things,  is prohibited from declaring or paying dividends,
making other  distributions  on, or redeeming or  repurchasing  Common Shares or
other Shares ranking junior to the Junior  Participating  Preferred Shares,  and
upon failure of the Company to pay such dividends for six quarters,  the holders
of the Junior  Participating  Preferred  Shares  will be  entitled  to elect two
Trustees. The holder of each Junior Participating Preferred Share is entitled to
100 votes on all matters submitted to a vote of the shareholders, voting (unless
otherwise provided in the Declaration or by law) together with holders of Common
Shares as one class. Upon liquidation, dissolution or winding up of the Company,
the  holders  of  Junior  Participating  Preferred  Shares  are  entitled  to  a
liquidation  preference  of $100 per share  plus the amount of any  accrued  and
unpaid dividends and distributions thereon (the "Liquidation Preference"), prior
to payment  of any  distribution  in  respect of the Common  Shares or any other
Shares ranking junior to the Junior  Participating  Preferred Shares.  Following
payment of the  Liquidation  Preference,  the  holders  of Junior  Participating
Preferred Shares are not entitled to further  distributions until the holders of
Common  Shares  shall  have  received  an amount per share  (the  "Common  Share
Adjustment")  equal to the  Liquidation  Preference  divided by 100 (adjusted to
reflect  events such as stock  splits,  stock  dividends  and  recapitalizations
affected the Common Shares) (the "Adjustment Number").  Following the payment of
the full amount of the Liquidation  Preference and the Common Share  Adjustment,
holders of Junior  Participating  Preferred  Shares are entitled to  participate
proportionately  on a per share  basis  with  holders  of  Common  Shares in the
distribution  of the remaining  assets to be distributed in respect of Shares in
the ratio of the Adjustment Number to one, respectively. The powers, preferences
and  rights of the Junior  Participating  Preferred  Shares  are  subject to the
superior  powers,  preferences  and  rights  of any  senior  series  or class of
Preferred  Shares which the Trustees  shall,  from time to time,  authorize  and
issue.

                        DESCRIPTION OF DEPOSITARY SHARES

General

         The  description  set  forth  below  and in any  applicable  Prospectus
Supplement of certain provisions of any Deposit Agreement (as defined below) and
of the Depositary Shares and depositary receipts representing  Depositary Shares
("Depositary  Receipts")  does not purport to be complete  and is subject to and
qualified in its entirety by

                                       18

<PAGE>



reference to the forms of Deposit Agreement and Depositary  Receipts relating to
each series of the  Preferred  Shares  which have been or will be filed with the
Commission  at or  prior  to the  time of the  offering  of such  series  of the
Preferred Shares.

         The Company may, at its option,  elect to offer fractional interests in
shares of Preferred Shares, rather than shares of Preferred Shares. In the event
such  option is  exercised,  the  Company  will  provide  for the  issuance by a
Depositary (as defined  below) to the public of receipts for Depositary  Shares,
each of which  will  represent  a  fractional  interest  to be set  forth in the
Prospectus  Supplement  relating to a particular  series of the Preferred Shares
which will be filed with the  Commission at or prior to the time of the offering
of such series of the Preferred Shares as described  below.  Preferred Shares of
each series  represented by Depositary Shares will be deposited under a separate
deposit  agreement  (each,  a "Deposit  Agreement")  among the  Company  and the
depositary named therein (a "Depositary"). The Prospectus Supplement relating to
a series  of  Depositary  Shares  will set  forth  the name and  address  of the
Depositary. Subject to the terms of the applicable Deposit Agreement, each owner
of a Depositary Share will be entitled, in proportion to the fractional interest
of a share of a  particular  series  of  Preferred  Shares  represented  by such
Depositary  Share to all the  rights and  preferences  of the  Preferred  Shares
represented by such Depositary Shares (including dividend,  voting,  conversion,
redemption and liquidation rights).

         The Depositary  Shares will be evidenced by Depositary  Receipts issued
pursuant to the  applicable  Deposit  Agreement.  Upon  surrender of  Depositary
Receipts  at the  office  of the  Depositary  and upon  payment  of the  charges
provided in the Deposit Agreement and subject to the terms thereof,  a holder of
Depositary Shares is entitled to have the Depositary  deliver to such holder the
whole shares of Preferred Shares  underlying the Depositary  Shares evidenced by
the surrendered Depositary Receipts.

Dividends and Other Distributions

         A Depositary will be required to distribute all cash dividends or other
cash distributions received in respect of the applicable Preferred Shares to the
record holders of Depositary  Receipts  evidencing the related Depositary Shares
in proportion to the number of such  Depositary  Receipts owned by such holders,
subject to certain obligations of holders to file proofs, certificates and other
information  and to  pay  certain  charges  and  expenses  to  such  Depositary.
Fractions will be rounded down to the market whole cent.

         In the event of a distribution other than in cash, a Depositary will be
required  to  distribute  property  received  by it to  the  record  holders  of
Depositary Receipts entitled thereto,  subject to certain obligations of holders
to file proofs,  certificates  and other  information and to pay certain charges
and expenses to such  Depositary,  unless such Depositary  determines that it is
not feasible to make such distribution,  in which case such Depositary may, with
the approval of the Company,  sell such property and distribute the net proceeds
from such sale to such holders.

         No distributions will be made in respect of any Depositary Share to the
extent that it  represents  any  Preferred  Shares which have been  converted or
exchanged.  The Deposit Agreement will also contain  provisions  relating to the
manner in which any  subscription  or similar  rights  offered by the Company to
holders of the Preferred Shares shall be made available to holders of Depositary
Shares.

Redemption of Depositary Shares

         If a series of the Preferred Shares underlying the Depositary Shares is
subject to redemption,  the Depositary Shares will be redeemed from the proceeds
received by the Depositary  resulting from the redemption,  in whole or in part,
of such series of the Preferred  Shares held by the  Depositary.  The Depositary
shall mail notice of redemption not less than 30 and not more than 60 days prior
to the date  fixed  for  redemption  to the  record  holders  of the  Depositary
Receipts  evidencing the Depositary Shares to be so redeemed at their respective
addresses  appearing  in  the  Depositary's  books.  The  redemption  price  per
Depositary  Share will be equal to the  applicable  fraction  of the  redemption
price per share  payable  with respect to such series of the  Preferred  Shares.
Whenever the Company redeems shares of Preferred  Shares held by the Depositary,
the Depositary will redeem as of the same

                                       19

<PAGE>



redemption date the number of Depositary  Shares relating to shares of Preferred
Shares  so  redeemed.  If  less  than  all of the  Depositary  Shares  are to be
redeemed,  the  Depositary  Shares to be redeemed will be selected by lot or pro
rata as may be determined by the Depositary.

         After the date fixed for  redemption,  the Depositary  Shares so called
for redemption  will no longer be deemed to be outstanding and all rights of the
holders of the Depositary Shares and the related Depositary Receipts will cease,
except the right to receive  the moneys  payable  upon such  redemption  and any
money or other  property  to which the  holders of such  Depositary  Shares were
entitled upon such redemption upon surrender to the Depositary of the Depositary
Receipts evidencing such Depositary Shares.

Voting of the Preferred Shares

         Upon  receipt  of notice of any  meeting  at which the  holders  of the
applicable  Preferred Shares are entitled to vote, a Depositary will be required
to mail the  information  contained  in such  notice of  meeting  to the  record
holders of the  Depositary  Receipts  evidencing  the  Depositary  Shares  which
represent  such  Preferred  Shares.  Each record holder of  Depositary  Receipts
evidencing  Depositary Shares on the record date (which will be the same date as
the record date for the  Preferred  Shares)  will be  entitled to instruct  such
Depositary as to the exercise of the voting  rights  pertaining to the amount of
Preferred Shares represented by such holder's Depositary Shares. Such Depositary
will  endeavor,  insofar as  practical,  to vote the amount of Preferred  Shares
represented by such Depositary Shares in accordance with such instructions,  and
the  Company  will  agree to take all  reasonable  action  which  may be  deemed
necessary by such  Depositary in order to enable such  Depositary to do so. Such
Depositary  will be  required  to abstain  from  voting the amount of  Preferred
Shares  represented by such Depositary  Shares to the extent it does not receive
specific  instructions from the holders of Depositary  Receipts  evidencing such
Depositary  Shares.  The Depositary  will not be responsible  for any failure to
carry out any  instruction to vote, or for the manner or effect of any such vote
made,  as long as such action or non-action is in good faith and does not result
from gross negligence or willful misconduct of such Depositary.

Liquidation Preference

         In the  event of the  liquidation,  dissolution  or  winding  up of the
Company, whether voluntary or involuntary,  the holders of each Depositary Share
will be entitled to the fraction of the  liquidation  preference  accorded  each
Preferred  Share  represented  by such  Depositary  Share,  as set  forth in the
applicable Prospectus Supplement.

Conversion of Preferred Shares

         The  Depositary  Shares,  as  such,  will  not be  convertible  into or
exchangeable  for Common  Shares,  Preferred  Shares or any other  securities or
property  of the  Company.  Nevertheless,  if so  specified  in  the  applicable
Prospectus  Supplement  relating  to  an  offering  of  Depositary  Shares,  the
Depositary  Receipts may be  surrendered  by holders  thereof to the  applicable
Depositary with written  instructions to such Depositary to instruct the company
to cause  conversion  or exchange of the  Preferred  Shares  represented  by the
Depositary Share evidenced by such Depositary Receipts into Common Shares, other
shares of Preferred  Shares of the Company or such other  securities as shall be
provided  therein,  and  the  Company  will  agree  that  upon  receipt  of such
instruction  and any  amounts  payable  in  respect  thereof,  it will cause the
conversion or exchange  thereof  utilizing the same procedures as those provided
for delivery of Preferred  Shares to effect such conversion or exchange.  If the
Depositary Shares evidenced by a Depositary  Receipt are to be converted in part
only, a new  Depositary  Receipt or  Depositary  Receipts will be issued for any
Depositary Shares not to be converted.

Amendment and Termination of a Deposit Agreement

         Any form of Depositary  Receipt  evidencing  Depositary  Shares and any
provision of a Deposit  Agreement will be permitted at any time to be amended by
agreement between the Company and the applicable Depositary.

                                       20

<PAGE>



However,  any amendment that  materially and adversely  alters the rights of the
holders of  Depositary  Shares will not be effective  unless such  amendment has
been approved by the existing  holders of at least a majority of the  applicable
Depositary  Shares then outstanding.  Every holder of an outstanding  Depositary
Receipt at the time any such amendment  becomes  effective  shall be deemed,  by
continuing  to hold  such  Depositary  Receipt,  to  consent  and  agree to such
amendment  and to be  bound  by the  applicable  Deposit  Agreement  as  amended
thereby.

         Any Deposit  Agreement  may be  terminated by the Company upon not less
than 30 days' prior  written  notice to the  applicable  Depositary  if (i) such
termination  is necessary to preserve the  Company's  status as a REIT or (ii) a
majority  of each  series  of  Preferred  Shares  affected  by such  termination
consents to such  termination,  whereupon  such  Depositary  will be required to
deliver or make available to each holder of Depositary Receipts,  upon surrender
of the  Depositary  Receipts  held by such  holder,  such  number  of  whole  or
fractional  Preferred  Shares  as  are  represented  by  the  Depositary  Shares
evidenced by such Depositary  Receipts  together with any other property held by
such  Depositary  with receipts to such  Depositary  Receipts.  The Company will
agree in each Depositary  Agreement that if such Deposit Agreement is terminated
to preserve the Company's  status as a REIT,  then the Company will use its best
efforts to list the  Preferred  Shares  issued  upon  surrender  of the  related
Depositary  Shares on a national  securities  exchange.  In addition,  a Deposit
Agreement will automatically  terminate if (i) all outstanding Depositary Shares
thereunder  shall  have  been  redeemed;  (ii)  there  shall  have  been a final
distribution in respect of the related  Preferred  Shares in connection with any
liquidation,  dissolution  or winding up of the  Company  and such  distribution
shall have been distributed to the holders of Depositary Receipts evidencing the
Depositary Shares underlying such Preferred Shares; or (iii) each of the related
Preferred  Shares shall have been converted or exchanged into  securities not so
represented by Depositary Shares.

Charges of a Depositary

         The Company  will pay all  transfer  and other  taxes and  governmental
charges arising solely from the existence of a Deposit  Agreement.  In addition,
the Company will pay the fees and expenses of a Depositary  in  connection  with
the initial  deposit of the  Preferred  Shares and any  redemption  of Preferred
Shares.  However,  holders of Depositary Receipts will pay any transfer or other
governmental  charges and the fees and expenses of a  Depositary  for any duties
requested by such holders to be performed  which are outside of those  expressly
provided for in the applicable Deposit Agreement.

Resignation and Removal of Depositary

         A Depositary may resign at any time by delivering to the Company notice
of its  election to do so, and the Company may at any time remove a  Depositary,
any such  resignation  or  removal  to take  effect  upon the  appointment  of a
successor  Depositary.  A successor  Depositary will be required to be appointed
within 60 days after  delivery of the notice of  resignation or removal and will
be required to be a bank or trust  company  having its  principal  office in the
United States and having a combined capital and surplus of at least $50 million.

Miscellaneous

         A  Depositary  will be  required  to forward  to holders of  Depositary
Receipts any reports and  communications  from the Company which are received by
such Depositary with respect to the related Preferred Shares.

         Neither  Depositary  nor the Company  will be liable if it is prevented
from or delayed in, by law or any circumstances  beyond its control,  performing
its obligations under a Deposit Agreement.  The obligations of the Company and a
Depositary under a Deposit  Agreement will be limited to performing their duties
thereunder in good faith and without gross negligence or willful misconduct, and
neither the Company nor any applicable Depositary will be obligated to prosecute
or defend any legal proceeding in respect of any Depositary Receipts, Depositary
Shares or Preferred Shares represented thereby unless satisfactory  indemnity is
furnished.  The Company and any Depositary  will be permitted to rely on written
advice of counsel or accountants,  on information provided by persons presenting
Preferred Shares represented thereby for deposit, holders of Depositary Receipts
or other persons

                                       21

<PAGE>



believed  in good  faith  to be  competent  to  give  such  information,  and on
documents believed in good faith to be genuine and signed by a proper party.

         In the event a Depositary shall receive conflicting claims, requests or
instructions from any holders of Depositary  Receipts,  on the one hand, and the
Company,  on the other hand,  such  Depositary  shall be entitled to act on such
claims, requests or instructions received from the Company.

                             DESCRIPTION OF WARRANTS

         The  Company  may  issue,  together  with any other  series of  Offered
Securities or separately, Warrants entitling the holder to purchase from or sell
to the  Company,  or to receive  from the Company the cash value of the right to
purchase or sell, Debt Securities, Preferred Shares, Depositary Shares or Common
Shares.  The Warrants are to be issued under Warrant Agreements (each a "Warrant
Agreement")  to be entered  into  between the  Company and a warrant  agent (the
"Warrant  Agent"),  all as set  forth in the  applicable  Prospectus  Supplement
relating to the particular issue of Warrants.

         In the case of each  series  of  Warrants,  the  applicable  Prospectus
Supplement  will  describe  the terms of the  Warrants  being  offered  thereby,
including  the  following,  if  applicable:  (i) the  offering  price;  (ii) the
currencies  in which  such  Warrants  are being  offered;  (iii)  the  number of
Warrants offered; (iv) the securities underlying the Warrants;  (v) the exercise
price,  the  procedures for exercise of the Warrants and the  circumstances,  if
any,  that will cause the Warrants to be deemed to be  automatically  exercised;
(vi) the date on which the right shall  expire;  (vii) U.S.  federal  income tax
consequences; and (viii) other terms of the Warrants.

         Warrants  may be  exercised  at the  appropriate  office of the Warrant
Agent or any other office  indicated in the  applicable  Prospectus  Supplement.
Prior  to the  exercise  of  Warrants  entitling  the  holder  to  purchase  any
securities,  holders of such Warrants will not have any of the rights of holders
of the  securities  purchasable  upon such  exercise and will not be entitled to
payments made to holders of such securities.

         The  Warrant  Agreements  may be amended or  supplemented  without  the
consent of the holders of the Warrants issued  thereunder to effect changes that
are not  inconsistent  with  the  provisions  of the  Warrants  and  that do not
adversely affect the interests of the holders of the Warrants.

               DESCRIPTION OF CONVERTIBLE SUBORDINATED DEBENTURES

         In October  1996 the Company  issued $240 million  aggregate  principal
amount of convertible  subordinated  debentures (the  "Convertible  Subordinated
Debentures"),  consisting  of $70  million  aggregate  principal  amount of 7.5%
Convertible   Subordinated   Debentures  due  2003,  Series  A  (the  "Series  A
Debentures"),  $130  million  aggregate  principal  amount  of 7.5%  Convertible
Subordinated Debentures due 2003, Series B (the "Series B Debentures"),  and $40
million aggregate principal amount of 7.25% Convertible  Subordinated Debentures
due 2001  (the  "7.25%  Debentures").  The  Series A  Debentures  and the  7.25%
Debentures were sold in offerings  registered  under the Securities Act, and the
Series B  Debentures  were sold in an  offering  outside  of the  United  States
pursuant to Regulation S promulgated under the Securities Act.

         The Convertible  Subordinated  Debentures are  convertible  into Common
Shares,  initially at a conversion  price of $18 per Common  Share,  at any time
prior to maturity or earlier  redemption.  Such  conversion  price is subject to
adjustment   in  certain   events,   including   the  payment  of  dividends  or
distributions  on the  Company's  Shares  in  Common  Shares  or  certain  other
securities  issued by the Company,  the issuance to all holders of Common Shares
of rights, options or warrants entitling them to subscribe for Common Shares (or
securities convertible into Common Shares),  subdivisions or combinations of the
Common Shares into a greater or smaller  number of shares,  reclassification  of
Common  Shares  resulting  in an  issuance  of any of the  Company's  Shares and
certain  mergers  or  combination  or sales of  substantially  all assets of the
Company.


                                       22

<PAGE>



         As of May 1, 1997  $28.3  million in  principal  amount of the Series A
Debentures had been converted into an aggregate of 1,573,879 Common Shares,  and
none of the 7.25% Debentures or Series B Debentures had been converted.

         The indebtedness evidenced by the Convertible  Subordinated  Debentures
is subordinated  and junior in right of payment,  to the extent set forth in the
trust indenture applicable thereto, to the prior payment in full of amounts then
due in respect of all indebtedness of the Company for borrowed money and certain
other indebtedness, excluding (i) indebtedness of the Company to a subsidiary or
an officer, director,  trustee or employee of the Company or a subsidiary,  (ii)
indebtedness  of the  Company  which,  pursuant  to the terms of the  instrument
creating or evidencing such  indebtedness,  is expressly made pari passu with or
subordinate in right of payment to the Convertible  Subordinated  Debentures and
(iii) any liability of the Company for taxes.

         The  preceding   discussion   of  certain  terms  of  the   Convertible
Subordinated  Debentures is a summary of certain  provisions of the  Convertible
Subordinated  Debentures and the related trust  indenture.  Such discussion does
not purport to be complete  and is in all respects  subject to and  qualified in
its  entirety  by  reference  to the  complete  terms  thereof and of such trust
indenture.

                 LIMITATION OF LIABILITY; SHAREHOLDER LIABILITY

         Maryland law permits a REIT to provide,  and the Declaration  provides,
that no trustee, officer, shareholder, employee or agent of the Company shall be
held to any personal liability,  jointly or severally,  for any obligation of or
claim  against  the  Company,  and that,  as far as  practicable,  each  written
agreement of the Company is to contain a provision to that effect. Despite these
facts,   counsel  has  advised  the  Company  that  in  some  jurisdictions  the
possibility  exists  that  shareholders  of a  non-corporate  entity such as the
Company may be held liable for acts or obligations  of the Company.  Counsel has
advised  the  Company  that  the  State  of Texas  may not  give  effect  to the
limitation of shareholder liability afforded by Maryland law, but that Texas law
would  likely  recognize  contractual  limitations  of  liability  such as those
discussed  above.  The  Company  intends to  conduct  its  business  in a manner
designed to minimize  potential  shareholder  liability  by, among other things,
inserting appropriate provisions in written agreements of the Company;  however,
no assurance can be given that shareholders can avoid liability in all instances
in all jurisdictions.

         The  Declaration  provides  that,  upon payment by a shareholder of any
such  liability,  the  shareholder  will be entitled to  indemnification  by the
Company.  There can be no assurance that, at the time any such liability arises,
there  will be  assets  of the  Company  sufficient  to  satisfy  the  Company's
indemnification obligation. The Trustees intend to conduct the operations of the
Company,  with the advice of counsel,  in such a way as to minimize or avoid, as
far as practicable,  the ultimate  liability of the shareholders of the Company.
The  Trustees  do not intend to  provide  insurance  covering  such risks to the
shareholders.

        REDEMPTION; BUSINESS COMBINATIONS AND CONTROL SHARE ACQUISITIONS

Redemption and Business Combinations

         For the  Company to qualify  as a REIT under the Code,  in any  taxable
year,  not  more  than  50% in value of its  outstanding  Shares  may be  owned,
directly or indirectly by five or fewer  individuals  during the last six months
of such year,  and the  shares  must be owned by 100 or more  persons  during at
least 335 days of a taxable year or a proportionate  part of a taxable year less
than 12 months. In order to meet these and other requirements, the Trustees have
the power to redeem or prohibit the transfer of a sufficient number of Shares to
maintain  or bring  the  ownership  of the  Shares  into  conformity  with  such
requirements.  In connection  with the foregoing,  if the Trustees shall, at any
time and in good faith,  be of the opinion that direct or indirect  ownership of
shares representing more than 8.5% in value of the total Shares outstanding (the
"Excess  Shares") has or may become  concentrated in the hands of one beneficial
owner,  other than Excepted  Persons,  the Trustees  shall have the power (i) to
purchase from any  shareholder  of the Company such Excess  Shares,  and (ii) to
refuse to transfer or issue

                                       23

<PAGE>



Shares to any person whose  acquisition of such Shares would,  in the opinion of
the  Trustees,  result in the direct or  indirect  beneficial  ownership  by any
person of Shares representing more than 8.5% in value of the outstanding Shares.
Any transfer of Shares,  options,  or other  securities  convertible into Shares
that would create a beneficial owner (other than any of the Excepted Persons) of
Shares  representing  more than 8.5% in value of the  total  Shares  outstanding
shall be deemed  void ab initio,  and the  intended  transferee  shall be deemed
never to have had an interest  therein.  Further the  Declaration  provides that
transfers or purported acquisitions,  directly, indirectly or by attribution, of
Shares,   or  securities   convertible   into  Shares,   that  could  result  in
disqualification  of the  Company  as a REIT are null and void and  permits  the
Trustees to repurchase  Shares or other  securities  to the extent  necessary to
maintain the Company's  status as a REIT.  The purchase  price for any Shares so
purchased  shall be  determined  by the  price of the  Shares  on the  principal
exchange on which they are then traded,  or if no such price is available,  then
the  purchase  price  shall be equal to the net  asset  value of such  Shares as
determined by the Trustees in accordance with applicable law. From and after the
date fixed for purchase by the Trustees,  and so long as payment of the purchase
price for the Shares to be so  redeemed  shall  have been made or duly  provided
for, the holder of any Excess  Shares so called for  purchase  shall cease to be
entitled to  distributions,  voting  rights and any and all other  benefits with
respect to such Shares,  except the right to payment of the  purchase  price for
the Shares.

         The Declaration  also requires that Business  Combinations  between the
Company  and a  beneficial  holder of 10% or more of the  outstanding  Shares (a
"Related Person") be approved by the affirmative vote of the holders of at least
75% of the Shares unless (1) the Trustees by unanimous  vote or written  consent
shall have  expressly  approved in advance the  acquisition  of the  outstanding
Shares that caused the Related  Person to become a Related  Person or shall have
approved the Business  Combination  prior to the Related Person  involved in the
Business  Combination  having  become  a  Related  Person;  or (2) the  Business
Combination  is solely  between the Company  and a 100% owned  affiliate  of the
Company.  As  permitted  by law,  the Company has elected to be governed by such
provisions  rather  than  the  provisions  of  Subtitle  6 of  Title  3  of  the
Corporations  and  Associations  Article  of  the  Annotated  Code  of  Maryland
regarding business combinations.

         Under the  Declaration the number of trustees may be fixed from time to
time by two-thirds of the Trustees or by an amendment of the  Declaration by the
shareholders  of the  Company,  with a  minimum  of three  and a  maximum  of 12
trustees, a majority of whom must be Independent Trustees. The Declaration fixes
the current  number of trustees of the Company at five and divides the  Trustees
into three groups.  Trustees in each group are elected to three-year  terms.  As
the  Trustees'  terms  expire,  replacements  are  elected by a majority  of the
outstanding  Shares.  The  classified  nature of the  Trustees  may make it more
difficult for the  shareholders  to remove the management of the Company than if
all  trustees  were  elected on an annual  basis.  Vacancies  may be filled by a
majority of the remaining trustees,  except that a vacancy among the Independent
Trustees must be filled by a majority of the remaining  Independent  Trustees or
by majority vote of the Company's  shareholders.  Any trustee may be removed for
cause by all the remaining  trustees,  or without cause by vote of two-thirds of
the Shares then outstanding and entitled to vote thereon.

         The  provisions  regarding  business  combinations  and the  classified
nature of the Trustees and certain  other matters may not be repealed or amended
without the affirmative  vote of at least 75% of the of the  shareholders of the
Company,  provided  that the  Trustees,  by two-thirds  vote,  may,  without the
approval or consent of the  shareholders,  adopt any amendment that they in good
faith determine to be necessary to permit the Company to qualify as a REIT under
the Code.

         The foregoing provisions may have the effect of discouraging unilateral
tender offers or other takeover proposals which certain  shareholders might deem
in their interests or pursuant to which they might receive a substantial premium
for their  Shares.  The  provisions  could  also have the  effect of  insulating
current  management  against the  possibility of removal and could,  by possibly
reducing  temporary  fluctuations  in market  price caused by  accumulations  of
Shares,  deprive  shareholders of opportunities to sell at a temporarily  higher
market  price.  However,  the Trustees  believe  that  inclusion of the business
combination  provisions  in the  Declaration  may help assure fair  treatment of
shareholders and preserve the assets of the Company.


                                       24

<PAGE>



Control Share Acquisition

         Maryland law provides for a limitation  of voting  rights in a "control
share  acquisition." The Maryland statute defines a control share acquisition at
the 20%, 33 1/3% and 50%  acquisition  levels,  and requires a  two-thirds  vote
(excluding  shares  owned  by  the  acquiring  person  and  certain  members  of
management)  to  accord  voting  rights to shares  acquired  in a control  share
acquisition.  The statute  would  require  the target  company to hold a special
meeting at the request of an actual or proposed  control share acquiror  subject
to compliance with certain conditions by such acquiror. In addition,  unless the
charter,  declaration of trust or by-laws provide  otherwise,  the statute gives
the company, within certain time limitations, various redemption rights if there
is a  shareholder  vote on the  issue  and the  grant of  voting  rights  is not
approved,  or if an "acquiring  person statement" is not delivered to the target
company within 10 days following a control share acquisition.  Moreover,  unless
the charter,  declaration  of trust or by-laws  provide  otherwise,  the statute
provides that if, before a control share acquisition  occurs,  voting rights for
control shares are approved at a shareholders'  meeting and the acquiror becomes
entitled  to vote a majority  of the  shares  entitled  to vote,  then all other
shareholders may exercise appraisal rights. The statute does not apply to shares
acquired in a merger,  consolidation or share exchange if the company is a party
to the  transaction.  An  acquisition of shares may be exempted from the control
share statute provided that a charter,  declaration of trust or by-law provision
is adopted for such purpose prior to the control share acquisition. There are no
such provisions in the Declaration or By-laws of the Company.

Rights Plan

         In October 1994 the  trustees  adopted a  shareholder  rights plan (the
"Rights  Plan").  The Rights Plans provides for the  distribution  of one Junior
Participating  Preferred Share purchase right (a "Right") for each Common Share.
Each  Right  entitles  the  holder  to buy  1/100th  of a  Junior  Participating
Preferred Share (or, in certain circumstances, to receive cash, property, Common
Shares or other  securities  of the  Company)  at an  exercise  price of $50 per
1/100th of a Junior Participating  Preferred Share. Certain powers,  preferences
and rights and  certain  qualifications,  limitations  and  restrictions  of the
Junior Participating Preferred Shares are summarized above under "Description of
Preferred Shares--Junior Participating Shares."

         Initially, the Rights are attached to certificates  representing Common
Shares.  The Rights will separate  from such Common  Shares and a  "Distribution
Date" will occur upon earlier of (1) 10 business days (or such later date as the
Trustees may determine  before a  Distribution  Date occurs)  following a public
announcement  by the Company  that a person or group  affiliated  or  associated
persons,  with certain exceptions (an "Acquiring Person"),  has acquired, or has
obtained  the  right  to  acquire,  beneficial  ownership  of 10% or more of the
outstanding  Common  Shares  (the  date of  such  announcement  being  a  "Share
Acquisition  Date") or (ii) 10 business days (or such later date as the Trustees
may determine before a Distribution Date occurs) following the commencement of a
tender  offer or  exchange  offer  that  would  result in a person  becoming  an
Acquiring Person.

         Until the  Distribution  Date,  (i) the Rights will be evidenced by the
certificates  for Common Shares and will be transferred  with and only with such
Common  Share  certificates,  (ii)  Common  Share  certificates  will  contain a
notation  incorporating  the rights agreement  pursuant to which the Rights were
issued  (the  "Rights  Agreement")  by  reference  and (iii) the  surrender  for
transfer of any certificates for Common Shares  outstanding will also constitute
the transfer of the Rights associated with the Common Shares represented by such
certificates.

         The Rights are not  exercisable  until the  Distribution  Date and will
expire at the close of business on October 17, 2004,  unless earlier redeemed or
exchanged by the Company as described  below.  Until a Right is  exercised,  the
holder  thereof,  as  such,  has no  rights  as a  shareholder  of the  Company,
including, without limitation, the right to vote or to receive dividends.

         In the event (a "Flip-In  Event") a Person becomes an Acquiring  Person
(except pursuant to a tender or exchange offer for all outstanding Common Shares
at a price and on terms which a majority of the Company's  Outside  Trustees (as
defined in the Rights  Agreement)  determines to be fair to and otherwise in the
best interests

                                       25

<PAGE>



of the Company and its  shareholders (a "fair  offer")),  each holder of a Right
will thereafter have the right to receive,  upon exercise of such Right,  Common
Shares (or, in certain circumstances,  cash, property or other securities of the
Company)  having a Current  Market  Price (as  defined in the Rights  Agreement)
equal  to two  times  the  exercise  price  of the  Right.  Notwithstanding  the
foregoing,  following the occurrence of any Flip-In Event,  all Rights that are,
or  (under  certain  circumstances  specified  in the  Rights  Agreement)  were,
beneficially  owned by any Acquiring Person (or by certain related parties) will
be null  and  void in the  circumstances  set  forth  in the  Rights  Agreement.
However,  Rights will not be exercisable following the occurrence of any Flip-In
Event until such time as the Rights are no longer  redeemable  by the Company as
set forth below.

         In the event (a  "Flip-Over  Event")  that, at any time on or after the
Share  Acquisition  Date,  (i) the Company  shall take part in a merger or other
business combination  transaction (other than certain mergers that follow a fair
offer) and the  Company  shall not be the  surviving  entity or (ii) the Company
shall take part in a merger or other business  combination  transaction in which
the Common  Shares are changed or  exchanged  (other than  certain  mergers that
follow a fair  offer) or (iii) 50% or more of the  Company's  assets or  earning
power is sold or  transferred,  each  holder  of a Right  (except  Rights  which
previously have been voided, as set forth above) shall thereafter have the right
to receive,  upon exercise,  a number of shares of common stock of the acquiring
company  having a Current  Market Price equal to two times the exercise price of
the Right.  Flip-In Events and Flip-Over Events are collectively  referred to as
"Triggering Events."

         The  Purchase  Price  payable  and the  number of Junior  Participating
Preferred Shares (or the amount of cash, property or other securities)  issuable
upon  exercise  of the Rights are  subject  to  adjustment  from time to time to
prevent  dilution  (i) in the event of a share  dividend  on, or a  subdivision,
combination or reclassification of, the Junior  Participating  Preferred Shares,
(ii) if holders of the Junior Participating Preferred Shares are granted certain
rights or warrants to subscribe  for Junior  Participating  Preferred  Shares or
convertible  securities  at less than the  Current  Market  Price of the  Junior
Participating  Preferred Shares or (iii) upon the distribution to holders of the
Junior  Participating  Preferred  Shares of evidences of  indebtedness or assets
(excluding  regular  quarterly  cash  dividends)  or of  subscription  rights or
warrants  (other than those  referred to above).  With  certain  exceptions,  no
adjustment in the Purchase Price will be required until  cumulative  adjustments
amount to at least 1% of the  Purchase  Price.  The  Company is not  required to
issue fractional  Shares upon the exercise of any Right, and in lieu thereof,  a
cash payment will be made.

         At any time until 10  business  days  following  the Share  Acquisition
Date, the Company may redeem the Rights in whole, but not in part, at a price of
$.01 per Right, payable, at the option of the Company, in cash, Common Shares or
other  consideration  as  the  Trustees  may  determine.  Immediately  upon  the
effectiveness of the action of the Trustees  ordering  redemption of the Rights,
the Rights will terminate and the only right of the holders of Rights will be to
receive the $.01 per Right redemption price.

         The term of the Rights,  other than key financial terms and the date on
which  the  Rights  expire,  may  be  amended  by  the  Trustees  prior  to  the
Distribution  Date.  Thereafter,  the provisions of the Rights  Agreement may be
amended  by the  Trustees  only  in  order  to cure  any  ambiguity,  defect  or
inconsistency,  to make changes which do not  adversely  affect the interests of
holders of Rights  (excluding the interests of any Acquiring  Person and certain
other  related  parties)  or to shorten or lengthen  any time  period  under the
Rights  Agreement;  provided,  however,  that no  amendment to lengthen the time
period  governing  redemption is permitted to be made at such time as the Rights
are not redeemable.

                              PLAN OF DISTRIBUTION

         The Company may sell the Offered Securities to one or more underwriters
for  public  offering  and sale by them or may sell the  Offered  Securities  to
investors  directly or through agents. Any such underwriter or agent involved in
the offer and sale of the  Offered  Securities  will be named in the  applicable
Prospectus Supplement.


                                       26

<PAGE>



         The  distribution  of Offered  Securities  may be effected from time to
time in one or more  transactions  at a fixed  price  or  prices,  which  may be
changed,  at market prices  prevailing at the time of sale, at prices related to
such market  prices or at  negotiated  prices.  In  connection  with the sale of
Offered  Securities,  underwriters  or agents  may  receive or be deemed to have
received  compensation  from  the  Company  or from  purchasers  in the  form of
underwriting  discounts,  concessions  or  commissions.  Underwriters  may  sell
Offered  Securities  to  or  through  dealers,  and  such  dealers  may  receive
compensation  in the form of  discounts,  concessions  or  commissions  from the
underwriters or from purchasers.

         Any  underwriting  compensation  paid by the Company to underwriters or
agents in connection with the offering of Offered Securities, and any discounts,
concessions or commissions  allowed by  underwriters to  participating  dealers,
will be set forth in the applicable Prospectus Supplement. Underwriters, dealers
and agents  participating in the  distribution of the Offered  Securities may be
deemed  to be  underwriters,  and any  discounts,  concessions  and  commissions
received  by them and any  profit  realized  by them on  resale  of the  Offered
Securities may be deemed to be underwriting discounts and commissions, under the
Securities  Act.  Underwriters,  dealers  and  agents  may  be  entitled,  under
agreements  entered  into  with the  Company,  to  indemnification  against  and
contribution toward certain civil liabilities,  including  liabilities under the
Securities Act.

         If so indicated in the applicable  Prospectus  Supplement,  the Company
will authorize  underwriters or other persons acting as the Company's  agents to
solicit offers by certain  institutions to purchase Offered  Securities from the
Company at the public  offering  price set forth in such  Prospectus  Supplement
pursuant to  contracts  providing  for payment and  delivery on a future date or
dates.  Institutions  with whom such  contracts,  when  authorized,  may be made
include  commercial  and savings  banks,  insurance  companies,  pension  funds,
investment  companies,   educational  and  charitable  institutions,  and  other
institutions,  but will in all cases be subject to the  approval of the Company.
Any such  contracts  will be subject to the  condition  that the  purchase by an
institution of the Offered  Securities covered by its contracts shall not at the
time of delivery be prohibited  under the law of any  jurisdiction in the United
States to which such  institution  is subject  and,  if a portion of the Offered
Securities is being sold to  underwriters,  may be subject to the condition that
the Company shall have sold to such underwriters the Offered Securities not sold
for delayed delivery.  The underwriters and such other persons will not have any
responsibility in respect of the validity or performance of such contracts.

         Unless otherwise specified in the related Prospectus  Supplement,  each
series of Offered  Securities  will be a new issue with no  established  trading
market,  other  than  Common  Shares  which  are  listed  on the New York  Stock
Exchange.  Any Common  Shares sold pursuant to a Prospectus  Supplement  will be
listed on such  Exchange.  The  Company  may  elect to list any other  series of
Offered  Securities  on  an  exchange,  but  is  not  obligated  to do  so.  Any
underwriters  to whom  Offered  Securities  are sold by the  Company  for public
offering  and  sale  may  make a market  in such  Offered  Securities,  but such
underwriters  will not be  obligated  to do so and may  discontinue  any  market
making at any time without notice. No assurance can be given as to the liquidity
of or the trading markets for any Offered Securities.

         Certain of the  underwriters  and their affiliates may be customers of,
engage  in  transactions  with and  perform  services  for the  Company  and its
subsidiaries in the ordinary course of business.

         The specific terms and manner of sale of the Offered Securities will be
set forth or summarized in the applicable Prospectus Supplement.

                                  LEGAL MATTERS

         Certain legal matters with respect to the Offered Securities offered by
the Company  will be passed  upon for the  Company by Sullivan & Worcester  LLP,
Boston, Massachusetts. Sullivan & Worcester LLP, will rely, as to all matters of
Maryland law, upon one or more  opinions of Piper & Marbury  L.L.P.,  Baltimore,
Maryland.  Barry  M.  Portnoy,  a  retired  partner  of the firm of  Sullivan  &
Worcester LLP, is a Managing  Trustee of the Company and HPT, a director and 50%
shareholder of the HRPT Advisors, Inc., the advisor to the Company

                                       27

<PAGE>


("Advisors"),  and a director and/or significant  shareholder of certain lessees
and  mortgagors of the Company.  Sullivan & Worcester LLP  represents  Advisors,
HPT,  certain of such lessees and mortgagors  and certain  affiliates of each of
the foregoing on various matters.

                                     EXPERTS

         The consolidated  financial  statements of the Company  incorporated in
the Company's  Annual  Report on Form 10-K for the year ended  December 31, 1996
have been  audited by Ernst & Young LLP,  independent  auditors  as set forth in
their report thereon  incorporated by reference therein and incorporated  herein
by  reference  which,  as to the year  1996,  is based in part on the  report of
Arthur Andersen LLP,  independent public accountants.  Such financial statements
are  incorporated  herein by reference in reliance  upon such reports given upon
the authority of such firms as experts in accounting and auditing.

         The consolidated financial statements of Marriott  International,  Inc.
incorporated by reference in this  Prospectus and elsewhere in the  registration
statement  to the extent and for the periods  indicated in their  reports,  have
been audited by Arthur Andersen LLP,  independent  public  accountants,  and are
included herein in reliance upon the authority of said firm as experts in giving
said reports.

                                -----------------


THE AMENDED AND  RESTATED  DECLARATION  OF TRUST OF THE  COMPANY,  DATED JULY 1,
1994, A COPY OF WHICH, TOGETHER WITH ALL AMENDMENTS THERETO (THE "DECLARATION"),
IS DULY FILED IN THE OFFICE OF THE DEPARTMENT OF ASSESSMENTS AND TAXATION OF THE
STATE OF  MARYLAND,  PROVIDES  THAT THE NAME "HEALTH AND  RETIREMENT  PROPERTIES
TRUST" REFERS TO THE TRUSTEES UNDER THE  DECLARATION  COLLECTIVELY  AS TRUSTEES,
BUT NOT INDIVIDUALLY OR PERSONALLY,  AND THAT NO TRUSTEE, OFFICER,  SHAREHOLDER,
EMPLOYEE  OR  AGENT OF THE  COMPANY  SHALL  BE HELD TO ANY  PERSONAL  LIABILITY,
JOINTLY OR SEVERALLY,  FOR ANY OBLIGATION OF, OR CLAIM AGAINST, THE COMPANY. ALL
PERSONS  DEALING WITH THE COMPANY,  IN ANY WAY, SHALL LOOK ONLY TO THE ASSETS OF
THE COMPANY FOR THE PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION.


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