EXHIBIT 10.33 EXECUTION COPY U.S. $450,000,000 FOURTH AMENDMENT TO THIRD AMENDED AND RESTATED REVOLVING LOAN AGREEMENT among HEALTH AND RETIREMENT PROPERTIES TRUST, as Borrower, THE LENDERS NAMED HEREIN, DRESDNER KLEINWORT BENSON NORTH AMERICA LLC, as Agent, FLEET NATIONAL BANK, as Administrative Agent Dated as of November 14, 1997 HEALTH AND RETIREMENT PROPERTIES TRUST FOURTH AMENDMENT TO THIRD AMENDED AND RESTATED REVOLVING LOAN AGREEMENT DATED AS OF NOVEMBER 14, 1997 This FOURTH AMENDMENT (this "Amendment") is dated as of November 14, 1997 among HEALTH AND RETIREMENT PROPERTIES TRUST, a real estate investment trust formed under the laws of the State of Maryland ("Borrower"), the several lenders listed on the signature pages hereof (the "Lenders"), DRESDNER KLEINWORT BENSON NORTH AMERICA LLC (as successor to Kleinwort Benson Limited), a limited liability company organized under the laws of Delaware, as agent for itself and the other Lenders (in such capacity, together with any successor in such capacity in accordance with the terms of the Loan Agreement, as defined below, "Agent"), and FLEET NATIONAL BANK (as successor to Fleet Bank of Massachusetts) a bank organized under the laws of the United States of America, as administrative agent (in such capacity, together with any successor in such capacity in accordance with the terms of the Loan Agreement, "Administrative Agent"), and is made with reference to the Third Amended and Restated Revolving Loan Agreement dated as of March 15, 1996, as amended by a First Amendment dated as of December 15, 1996, a Second Amendment and Waiver dated as of March 19, 1997 and a Third Amendment dated as of July 30, 1997 (as amended to date and from time to time hereafter, the "Loan Agreement") among Borrower, the Lenders, Agent, Administrative Agent and Co-Agents referred to therein and, in connection with Section 9 of the Loan Agreement and the guaranties given therein, HEALTH AND RETIREMENT PROPERTIES INTERNATIONAL, INC., a Delaware corporation and a direct wholly-owned Subsidiary of Borrower ("Retirement Properties"), CAUSEWAY HOLDINGS INC., a Massachusetts corporation and a direct wholly-owned Subsidiary of Borrower ("Causeway"), SJO CORPORATION, a Massachusetts corporation and a direct wholly-owned Subsidiary of Borrower ("SJO"), HUB PROPERTIES TRUST, HUB ACQUISITION TRUST, and HUB LA PROPERTIES TRUST, each a Maryland real estate investment trust and each a direct wholly-owned Subsidiary of Borrower (the "Trust Subsidiaries"), HUB REALTY FUNDING, INC., HUB MANAGEMENT, INC., HUB REALTY COLLEGE PARK, INC., HUB REALTY I, INC., HUB REALTY IV., INC. and HUB REALTY GOLDEN, INC., each a Delaware corporation and a wholly-owned Subsidiary of Borrower (the "Delaware Subsidiaries"), and HUB REALTY COLLEGE PARK I, LLC, a Maryland limited liability company and a wholly-owned Subsidiary of Borrower (the "LLC"). Capitalized terms used herein without definition shall have the same meanings herein as set forth in the Loan Agreement. 1 WHEREAS, Borrower has advised Lenders that it wishes to amend certain terms of the Loan Agreement; WHEREAS, subject to the terms set forth herein, Lenders have agreed to amend the Loan Agreement. NOW, THEREFORE, in consideration of the premises and the agreements, provisions and covenants herein contained, the parties hereto agree as follows: 1. Amendments to Loan Agreement. (a) Section 1.1 of the Loan Agreement is hereby amended by the amendment and restatement of the definition of "Facility" as follows:- ""Facility" means each (i) operating facility offering health care or related services or rehabilitation or retirement services or other health care related income producing real property interest (including, without limitation, the Fee Interests and/or Leasehold Interests and/or Mortgage Interests associated with such facility) in which Borrower or any of its Subsidiaries has acquired or will acquire an interest as owner, lessee or mortgagee, and (ii) facility comprising office or similar administrative type space (including, without limitation, the Fee Interest and/or Leasehold Interests associated with such facility) in which Borrower or any of its Subsidiaries has acquired an interest as owner or lessee and which facility is leased or subleased by Borrower or any of its Subsidiaries to a Government Agency or, in the case of a Medical Office Asset, for medical research and development or, in the case of a Fee or Mortgage Interest described in Section 6.7(vi), for any business purpose, including, without limitation, in the case of both (i) and (ii), each Property and Mortgaged Property. (b) Section 6.7 of the Loan Agreement is hereby amended by deleting the word "and" immediately before (v) in the text thereof and replacing it with a comma, deleting the period at the end thereof and adding the following proviso at the end thereof:- ", and (vi) notwithstanding the preceding provisions of this Section 6.7, Borrower shall not be deemed to have made any material change in the nature of its business as presently conducted to the extent that the Borrower directly, or indirectly through a Subsidiary, acquires or operates, or acquires or funds a Mortgage Interest in, income producing real property interests and facilities not heretofore described in this Section 6.7 if such real property interests or Mortgage Interests (i) valued at cost as of 2 the date of their respective acquisitions, do not in the aggregate exceed 10% of the aggregate Allowed Value of the Properties and Mortgage Interests of the Borrower and its Subsidiaries on a consolidated basis determined (x) at the time of such acquisition or (y) if a facility is at the time of its acquisition of a type heretofore described in this Section 6.7 but is thereafter converted to a type not heretofore so described, on the date of such conversion, and (ii) are not treated by the Borrower as Eligible Properties or Eligible Mortgages, as the case may be, for any purpose of this Agreement." (c) Sections 7.1 (r) and (s) of the Loan Agreement are hereby amended and restated as follows: "(r) Medical Office Assets and Clinics. More than 55% of the aggregate Allowed Value of the Properties and Mortgage Interests shall be attributable to Medical Office Assets and/or Clinics; or" (d) Sections 7.1 (t), (u) and (v) are hereby renumbered as Sections 7.1 (s), (t) and (u), respectively. 2. Conditions to Effectiveness. Section 1 of this Amendment shall become effective immediately upon the prior or concurrent satisfaction of the conditions that Borrower shall deliver to Agent for Lenders (with sufficient originally executed copies for each Lender) executed copies of this Amendment, executed by Borrower, Retirement Properties, Causeway, SJO, the Trust Subsidiaries, the Delaware Subsidiaries and the LLC, Agent, Co-Agent(s) and the Majority Lenders. 3. Representations and Warranties. In order to induce Lenders and Agent to enter into this Amendment and to amend the Loan Agreement in the manner provided herein, Borrower represents and warrants to each Lender and Agent that the following statements are true, correct and complete: (a) Borrower has the power and authority to enter into this Amendment and to carry out the transactions contemplated by, and perform its obligations under, the Loan Agreement (as amended by this Amendment, the "Amended Agreement"). (b) The execution and delivery of this Amendment and the performance of the Amended Agreement have been authorized by all necessary action on the part of Borrower. 3 (c) The execution and delivery by Borrower of this Amendment and the performance by Borrower of the Amended Agreement and the use of proceeds thereunder (i) do not violate any Requirement of Law or Contractual Obligation of Borrower, (ii) will not result in, or require, the creation or imposition of any Lien on any of its properties or revenues pursuant to any Requirement of Law or Contractual Obligation of Borrower and (iii) do not require the consent of any third party. (d) This Amendment and the Amended Agreement have been duly executed and delivered by Borrower and are the legally valid and binding obligations of Borrower, enforceable against Borrower in accordance with their respective terms, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforcement of creditors' rights generally. (e) The representations and warranties contained in Section 3 of the Loan Agreement are and will be true, correct and complete in all material respects on and as of the effective date described in Section 2 to the same extent as though made on and as of that date, except to the extent such representations and warranties specifically relate to an earlier date, in which case they were true, correct and complete in all material respects on and as of such earlier date. (f) After giving effect to this Amendment, no event has occurred and is continuing or will result from the consummation of the transactions described in or otherwise contemplated by this Amendment that would constitute a Default or an Event of Default. (g) The Declaration of Trust, By-Laws and other organizational documents of Borrower have not been amended since May 14, 1997, and the copies thereof delivered to Lenders under the Loan Agreement are true, correct and complete copies thereof as in effect on the effective date described in Section 2. 4. Guarantors' Acknowledgement and Consent. Each of Retirement Properties, Causeway, SJO, the Trust Subsidiaries, the Delaware Subsidiaries and the LLC (each a "Subsidiary Guarantor") has guarantied the obligations of Borrower under Section 9 of the Loan Agreement. Each Subsidiary Guarantor hereby acknowledges that it has reviewed the terms and provisions of the Loan Agreement and this Amendment and consents to the amendment of the provisions of the Agreement effected pursuant to this Amendment. Each Subsidiary Guarantor hereby confirms that its guaranty under the Loan Agreement will continue to guaranty to the fullest extent possible the payment and performance of all obligations of Borrower now or hereafter existing under or in respect of the Amended Agreement and the Notes defined therein. Each Subsidiary Guarantor acknowledges and agrees that Section 9 of 4 the Loan Agreement shall continue in full force and effect and that all of its obligations thereunder shall be valid and enforceable and shall not be impaired or limited by the execution or effectiveness of this Amendment. Each Subsidiary Guarantor acknowledges and agrees that (a) notwithstanding the conditions to effectiveness set forth in this Amendment, such Subsidiary Guarantor is not required by the terms of the Loan Agreement to consent to the amendments to the Loan Agreement effected pursuant to this Amendment and (b) nothing in the Loan Agreement or this Amendment shall be deemed to require the consent of such Subsidiary Guarantor to any future amendments or waivers to the Loan Agreement. 5. Reference to and Effect on the Loan Agreement and Other Loan Documents. Except as specifically amended hereby, the Loan Agreement and the other Loan Documents shall remain in full force and effect and are hereby ratified and confirmed. 6. Fees and Expenses. Borrower agrees to pay to Agent on demand all reasonable costs, fees and expenses incurred by Agent (including, without limitation, legal fees and expenses) with respect to this Amendment and the documents and transactions contemplated hereby. 7. Execution in Counterparts. This Amendment may be executed in any number of counterparts, and by different parties hereto in separate counterparts, each of which when so executed and delivered shall be deemed an original, but all such counterparts taken together shall constitute but one and the same instrument. 8. Headings. Section headings in this Amendment are included herein for convenience of reference only and shall not constitute a part of this Amendment for any other purpose or be given any substantive effect. 9. APPLICABLE LAW. THIS AMENDMENT SHALL BE GOVERNED BY AND INTERPRETED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. 10. Limitation of Amendment. Without limiting the generality of the provisions of Section 10.4 of the Loan Agreement, the amendments set forth above shall be limited precisely as written, and nothing in this Amendment shall be deemed to prejudice any right or remedy that any Lender may now have (except to the extent such right or remedy was based upon existing defaults that will not exist after giving effect to this Amendment) or may have in the future under or in connection with the Loan Agreement or any other instrument or agreement referred to therein. 5 11. Acknowledgment. Borrower acknowledges that there are no existing claims, defenses, personal or otherwise, or rights of set off whatsoever with respect to the Amended Agreement or any of the other Loan Documents. 12. NONLIABILITY OF TRUSTEES. (a) THE DECLARATION OF TRUST ESTABLISHING BORROWER, DATED OCTOBER 9, 1986, A COPY OF WHICH, TOGETHER WITH ALL AMENDMENTS THERETO (THE "DECLARATION"), IS DULY FILED WITH 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 BORROWER SHALL BE HELD TO ANY PERSONAL LIABILITY, JOINTLY OR SEVERALLY, FOR ANY OBLIGATION OF, OR CLAIM AGAINST, BORROWER. ALL PERSONS DEALING WITH BORROWER, IN ANY WAY, SHALL LOOK ONLY TO THE ASSETS OF BORROWER FOR THE PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION. (b) THE DECLARATIONS OF TRUST ESTABLISHING HUB PROPERTIES TRUST DATED SEPTEMBER 12, 1996, HUB ACQUISITION TRUST DATED MARCH 14, 1997 AND HUB LA PROPERTIES TRUST DATED MAY 12, 1997, A COPY OF EACH OF WHICH, TOGETHER WITH ALL AMENDMENTS THERETO (THE "TRUST SUBSIDIARIES DECLARATIONS"), IS DULY FILED WITH THE DEPARTMENT OF ASSESSMENTS AND TAXATION OF THE STATE OF MARYLAND, PROVIDES THAT THE NAMES "HUB PROPERTIES TRUST", "HUB ACQUISITION TRUST" AND "HUB LA PROPERTIES TRUST" REFER TO THE RESPECTIVE TRUSTEES UNDER THE RESPECTIVE TRUST SUBSIDIARIES DECLARATIONS COLLECTIVELY AS TRUSTEES, BUT NOT INDIVIDUALLY OR PERSONALLY, AND THAT NO TRUSTEE, OFFICER, SHAREHOLDER, EMPLOYEE OR AGENT OF ANY OF THE TRUST SUBSIDIARIES SHALL BE HELD TO ANY PERSONAL LIABILITY, JOINTLY OR SEVERALLY, FOR ANY OBLIGATION OF, OR CLAIM AGAINST, SUCH TRUST SUBSIDIARY. ALL PERSONS DEALING WITH EACH TRUST SUBSIDIARY, IN ANY WAY, SHALL LOOK ONLY TO THE ASSETS OF SUCH TRUST SUBSIDIARY FOR THE PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION. [Remainder of page intentionally left blank] 6 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and delivered by their respective officers thereunto duly authorized as of the date first written above. HEALTH AND RETIREMENT PROPERTIES TRUST By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer DRESDNER KLEINWORT BENSON NORTH AMERICA LLC, as Agent By: /s/ Name: Title Executive Vice President By: /s/ Name: Title DRESDNER BANK AG, New York Branch, as a Lender By: /s/ Felix K. Camacho Name: Felix K. Camacho Title Assistant Treasurer By: /s/ Robert Grella Name: Robert Grella Title Vice President S - 1 FLEET NATIONAL BANK, as Administrative Agent and as a Lender By: /s/ Ginger Stolzenthaler Name: G. Stolzenthaler Title Senior Vice President BANK OF MONTREAL, as a Co-Agent and as a Lender By: /s/ Jeff Forsythe Name: Jeff Forsythe Title Director CIBC INC., as a Co-Agent and as a Lender By: /s/ Timothy E. Doyle Name: Timothy E. Doyle Title Managing Director CIBC Oppenheimer Corp as Agent CITICORP REAL ESTATE, INC., as a Co- Agent and as a Lender By: /s/ Susan McManigal Name: Susan McManigal Title Attorney-In-Fact CREDIT LYONNAIS, Cayman Island Branch, as a Co-Agent and as a Lender By: /s/ Farboud Tavangar Name: Farboud Tavangar Title First Vice President S - 2 FIRST UNION NATIONAL BANK, as a Co-Agent and as a Lender By: /s/ Joseph H. Towell Name: Joseph H. Towell Title Senior Vice President KEY CORPORATE CAPITAL INC., as a Co-Agent and as a Lender By: /s/ Angela G. Mago Name: Angela G. Mago Title Vice President SOCIETE GENERALE, as a Co-Agent and as a Lender By: /s/ Sedare Coradin Name: Sedare Coradin Title Vice President THE SUMITOMO BANK, LIMITED, as a Lender By: /s/D.G. Eastman Name: D.G. Eastman Title Vice President and manager By: /s/ Alfred DoGermanis Name: Alfred DoGermanis Title Vice President S - 3 ABBEY NATIONAL TREASURY SERVICES PLC, as a Lender By: /s/ R. Gambel Name: R. Gambel Title Asset Backed Securities VIA BANQUE, as a Lender By: /s/ C. Prot Name: C. Prot Title Senior Directory By: /s/ P. Arnout Name: P. Arnout Title Director RIGGS BANK N.A., as a Lender By: /s/ Name: Title THE BANK OF NEW YORK, as a Lender By: /s/ David C. Judge Name: David C. Judge Title Vice President S - 4 THE LONG-TERM CREDIT BANK OF JAPAN, LTD., New York Branch, as a Lender By: /s/ Hiroshi Kitada Name: Hiroshi Kitada Title Deputy General Manager THE BANK OF NOVA SCOTIA, New York Agency, as a Lender By: /s/ Chistopher I. Grant Name: Chistopher I. Grant Title Senior Relationship Manager BANQUE NATIONAL DE PARIS, as a Lender By: /s/ Katherine Wolfe Name: Katherine Wolfe Title Vice President By: /s/ Charles H. Day Name: Charles H. Day Title Assistant Vice President DG BANK, DEUTSCHE GENOSSENSCHAFTSBANK, Cayman Island Branch, as a Lender By: /s/ Linda J. O'Connell Name: Linda J. O'Connell Title Vice President By: /s/ Karen A. Brinkman Name: Karen A. Brinkman Title Vice President S - 5 SIGNET BANK, as a Lender By: /s/ Frieda M.A. McWilliams Name: Frieda M.A. McWilliams Title Vice President MITSUI LEASING (U.S.A.) INC., as a Lender By: /s/ Yuichi Kamizawa Name: Yuichi Kamizawa Title Vice President ARAB AMERICAN BANK, as a Lender By: /s/ Peter Rivera Name: Peter Rivera Title Assistant Vice President By: /s/ William G. Reynolds Name: William G. Reynolds Title Vice President For the purposes of Section 9: HEALTH AND RETIREMENT PROPERTIES INTERNATIONAL, INC. By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer CAUSEWAY HOLDINGS INC. By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer S - 6 SJO CORPORATION By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB PROPERTIES TRUST By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB ACQUISITION TRUST By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB LA PROPERTIES TRUST By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB REALTY FUNDING, INC. By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB MANAGEMENT, INC. By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer S - 7 HUB REALTY COLLEGE PARK, INC. By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB REALTY I, INC. By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB REALTY IV, INC. By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB REALTY GOLDEN, INC. By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer HUB REALTY COLLEGE PARK I, LLC By: /s/ Ajay Saini Name: Ajay Saini Title Treasurer S - 8