Exhibit 3-d BYLAWS OF TRUSTMARK CORPORATION (Incorporated under the laws of Mississippi) ARTICLE I OFFICES The principal office shall be in the City of Jackson, County of Hinds, State of Mississippi; and the name of the resident agent for process upon the corporation is T. Harris Collier, III, whose mailing address is 248 East Capitol Street, Jackson, Mississippi. The corporation may also have offices at such other places as the Board of Directors may from time to time appoint, or as the business of the corporation may require. ARTICLE II STOCKHOLDERS' MEETINGS 1. Place. The place of all meetings of stockholders shall be the principal office of the corporation in the City of Jackson, County of Hinds, State of Mississippi, or such other place as shall be determined, from time to time, by the Board of Directors. The place at which such meeting shall be held shall be stated in the notice and call of the meeting. 2. Time. The annual meeting of stockholders for the election of directors and for the transaction of such other business as may properly come before the meeting shall be held each year on the date and at the time selected by the Board of Directors and stated in the notice and call of the meeting. [This section was put in its present form effective December 9, 1997.] 3. Special Meetings. Special meetings of stockholders, for any purpose or purposes, unless otherwise prescribed by statute, may be called by the President or by a majority of the Board of Directors and shall be called at any time by the President or the Board of Directors upon the request of stockholders owning ten percent (10%) of the outstanding shares of the corporation entitled to vote at such meetings. Business transacted at all special meetings shall be confined to the objects stated in the call. 4. Notice. Written or printed notice stating the place, day and hour of the meeting (and in the case of a special meeting, the purpose or purposes for which the meeting is called) shall be given at least ten (10) days and not more than sixty (60) days prior to the meeting, at the direction of the President, the Secretary or other officer or persons calling the meeting. Such notice shall be given to each stockholder of record entitled to vote at the meeting; and notice shall be deemed delivered to the stockholder when deposited in the United States mail, postage prepaid, addressed to the stockholder at his last known post office address or to the address appearing on the stock transfer books of the corporation. 5. Voting List. A complete list of stockholders entitled to notice of the ensuing meeting, arranged in alphabetical order, with the address of and number of shares held by each, shall be prepared by the Secretary, who shall have charge of the stock transfer books of the corporation. The stockholders' list shall be available for inspection by any shareholder no later than two (2) business days after notice of the meeting is given for which the list was prepared and continuing through the meeting, at the corporation's principal office or at a place identified in the meeting notice in the city where the meeting will be held. 6. Quorum. A majority of the outstanding shares of the corporation entitled to vote, represented in person or by proxy, shall constitute a quorum at any meeting of stockholders, unless otherwise provided by law; but less than a quorum may adjourn any meeting, from time to time, and the meeting may be held, as adjourned, without further notice. 7. Voting of Shares. If a quorum is present, the affirmative vote of a majority of the shares represented at the meeting and entitled to vote shall be the act of the stockholders, unless the vote of a greater number is required by law for any specific purpose. Voting at all meetings may be oral, but any qualified voter may demand a stock vote whereupon the vote will be taken by ballot, each of which shall state the name of the stockholder voting and the number of shares voted by him; and if such ballot be cast by a proxy, it shall also state the name of such proxy. Subject to the provisions of Section 9 of this Article II (relating to cumulative voting for directors), each stockholder shall have one vote for each share of stock having voting power, registered in his name as of the closing date of the stock transfer books, upon each matter submitted to a vote at any meeting of stockholders. 8. Proxies. Every stockholder having the right to vote shall be entitled to vote either in person or by proxy executed in writing. No proxy shall be valid after eleven (11) months from the date of its execution, unless otherwise provided in the proxy. Proxies shall be dated and shall be filed with the records of the meeting. No officer or employee of Trustmark National Bank shall act as proxy. 9. Cumulative Voting. At each election for Directors every stockholder entitled to vote at such election shall have the right to vote, in person or by proxy, the number of shares owned by him for as many persons as there are Directors to be elected, and for whose election he has a right to vote, or to cumulate his votes by giving one candidate as many votes as the number of such Directors multiplied by the number of his shares shall equal, or by distributing such votes on the same principle among any number of such candidates. 10. Nominations for Director. Nominations for election to the Board of Directors may be made by the Board of Directors or by any stockholder of any outstanding class of capital stock of the corporation entitled to vote for election of directors. Nominations other than those made by or on behalf of the existing management of the corporation, shall be made in writing and shall be delivered or mailed to the Chairman of the Board of the corporation not less than fourteen (14) days nor more than fifty (50) days prior to any meeting of stockholders called for the election of directors; provided, however, that if less than twenty-one (21) days' notice of the meeting is given to shareholders, such nomination shall be mailed or delivered to the Chairman of the Board of the corporation not later than the close of business on the seventh (7th) day following the day on which the notice of the meeting was mailed. Such notification shall contain the following information to the extent known to the notifying shareholder: (a) the name and address of each proposed nominee; (b) the principal occupation of each proposed nominee; (C) the total number of shares of capital stock of the corporation that will be voted for each proposed nominee; (d) the name and residence address of the notifying shareholder; and (e) the number of shares of capital stock of the corporation owned by the notifying shareholder. Nominations not made in accordance herewith may, in his discretion, be disregarded by the chairman of the meeting, and upon his instructions the vote tellers may disregard all votes cast for each such nominee. 11. Judges of the Election. Every election of directors shall be managed by three judges, who shall be appointed by the chairman and who shall hold, either directly or indirectly (including, without limitation, indirect ownership as a participant in any pension plan, profit sharing plan or other employee benefit plan) shares of the corporation. The judges of election shall hold and conduct the election at which they are appointed to serve; and, after the election, they shall file with the Secretary a Certificate under their hands certifying the results thereof and the names of the directors elected. The judges of election, at the request of the chairman for the meeting, shall act as tellers of any other vote by ballot taken at such meeting, and shall certify the results thereof. ARTICLE III BOARD OF DIRECTORS 1. General Powers. The management of all the affairs, of the corporation shall be vested in the Board of Directors. 2. Number, Tenure and Qualifications. The number of directors of the corporation shall be not less than five (5) nor more than twenty-six (26) members, the exact number within such minimum and maximum limits to be fixed and determined from time to time by resolution of a majority of the full Board of Directors or by resolution of the stockholders at any meeting thereof. Each director shall hold office for one (1) year and until his successor shall have been elected and qualified. Each director shall own in his own right common or preferred shares of Trustmark National Bank or the corporation, with an aggregate par, fair market or equity value of not less than $1,000 as of either (I) the date of purchase, (ii) the date the person became a director, or (iii) the date of that person's most recent election to the board of directors whichever is more recent. Any combination of common or preferred stock of Trustmark National Bank or the corporation may be used. [The first sentence of this section was put in its present form effective May 13, 1997.] 3. Vacancies. All vacancies in the Board of Directors, whether caused by resignation, death, increase in the number of directors or otherwise, shall be filled through appointment by a majority of the remaining Directors then in office at an annual or special meeting called for that purpose. A director thus elected to fill any vacancy shall hold office until the next annual meeting of stockholders and until his successor is elected and qualifies. 4. Regular Meetings. Regular meetings of the Board of Directors, when required, shall be held on the second Tuesday of each month. Formal advance notice shall not be required. If any regular meeting shall fall on a holiday, it may be held upon such other day as may be designated by the Chairman of the Board of Directors or the President of the corporation. Regular meetings may be held without notice at the principal office of the corporation at such time as may be determined by the Chairman or President. 5. Special Meetings. Special meetings may be called at any time by the President, the Chairman of the Board of Directors or by a majority of the directors at such time and place as may be designated. Notice of special meetings shall be given stating the time and place, at least two (2) days in advance thereof by letter, telegram, facsimile, or personally. 6. Quorum. A majority of the entire board of directors then in office shall constitute a quorum, and the affirmative vote of a majority of those present and voting shall be the action of the Board. Less than a quorum may adjourn any meeting to a subsequent day without further notice until a quorum can be had. If the number of directors is reduced below the number that would constitute a quorum based upon the total number of required director positions, then no business may be transacted, except selecting directors to fill vacancies in conformance with Article III, Section 3. If a quorum is present, the Board of Directors may take action through the vote of a majority of the directors in attendance. 7. Organization. The Chairman, upon receiving the certificate of the judges of the result of any election, shall notify the directors - elect of their election and of the time at which they are required to meet at the principal office of the corporation for the purpose of organizing the new Board. After the Board has organized it should by resolution designate from among its members an Executive Committee or other committees, each of which shall have all the authority of the Board of Directors except as limited in such resolution or bylaw, appoint officers, fix salaries for the ensuing year, and transact such other business as may properly come before the organizational meeting. The organization meeting shall be appointed to be held on the day of the election or as soon thereafter as practicable, and, in any event, within thirty (30) days thereof. If, at the time fixed for such meeting, there shall be no quorum present, the directors present may adjourn the meeting, from time to time, until a quorum is obtained. All committees of the Board shall keep regular minutes of their meetings and shall report their actions to the Board of Directors at its next meeting. 8. Compensation. Directors may be compensated for their services on the Board at such times, in such amounts and in accordance with such compensation plans as the Board of Directors, by proper action, shall determine. Provided, however, that any member of the Board who is also an officer of the corporation or of Trustmark National Bank shall not be compensated for service on the Board of Directors. All directors may be reimbursed for actual expenses incurred in connection with service on the Board as the Board of Directors, by proper action, shall determine. 9. Informal Action. Any action of the corporation required to be taken, or which may be taken, at a meeting of the directors, may be taken without a meeting if a consent in writing, setting forth the action so taken, shall be signed by all the directors entitled to vote thereon. Such consent shall have the same force and effect as a unanimous vote of directors and may be stated as such in any document filed with any governmental agency or body. 10. Voting of Shares in Other Corporations. The Chairman, the President or such other officer or person as may be designated by resolution may act for the corporation in voting shares it owns of any other corporation. The Board may determine the manner in which such shares are to be voted or may delegate to its representative the authority to vote such shares in the best interests of the corporation. 11. Honorary or Advisory Directors. Honorary or advisory members of the Board of Directors, without voting power or power of final decision in matters concerning the business of the corporation, may be appointed by resolution of a majority of the full Board of Directors at any annual or special meeting. Honorary or advisory directors shall not be counted to determine the number of directors of the corporation or the presence of a quorum in connection with any board action, and shall not be required to own qualifying shares. 12. Executive Committee. The Board may appoint an Executive Committee of not less than four (4) nor more than five (5) outside Directors. The Chairman and such other officers or persons as may be designated by the Board, shall serve as members of the committee. One or more honorary or advisory directors appointed by the Chairman may serve as ex officio members of the committee. The committee shall exercise, when the Board is not in session, all powers of the Board that may lawfully be delegated to it. The committee shall have the power to fix the time and place of its meetings, prescribe its procedures, and cooperate with and assist the officers of the corporation in the transaction of its business. The committee shall keep minutes of its meetings, and such minutes shall be available for inspection by the Board, the regulatory authorities, or such others as may lawfully be authorized. 13. Audit Committee. The Board may appoint an Audit Committee composed of not less than three (3) Directors, exclusive of any active officers, at such times and for such terms as shall be determined by the Board. If appointed the duties of the Audit Committee shall be prescribed by the Board. Such duties may include, without limitation, the duty to examine the affairs of the corporation, or to cause suitable examinations to be made by auditors responsible only to the Board of Directors and to report the result of such examination in writing to the Board at the next regular meeting thereafter. The Board may elect, in lieu of such periodic audits, to adopt an adequate continuous audit system. If requested by the Board, the report of the Audit Committee shall state whether the corporation is in sound condition, whether adequate internal controls and procedures are being maintained, and shall recommend to the Board such changes in the manner of conducting the affairs of the corporation as shall be deemed advisable. The Audit Committee shall keep minutes of its meetings, and such minutes shall be available for inspection by the Board, the regulatory authorities, or such others as may lawfully be authorized. 14. Other Committees. There may be such other committees as the Board from time to time deems advisable. The committees shall have purposes, duties, powers and responsibilities as determined by the Board. Each committee shall establish its procedures and shall keep minutes of its meetings, and such minutes shall be available for inspection by the Board, the regulatory authorities, or such others as may lawfully be authorized. ARTICLE IV OFFICERS 1. Number. The officers of the corporation shall be a Chairman of the Board, a President, a Secretary and a Treasurer, each of whom shall be elected by the Board of Directors. The Board of Directors may elect a Vice Chairman of the Board or a Vice President when and as it deems necessary. Such other officers and assistant officers as may be deemed necessary may be elected or appointed by the Board of Directors from time to time. Any two or more offices may be held by the same person, except the offices of President and Secretary. 2. Election and Terms of Office. The officers of the corporation shall be elected annually by the Board of Directors at its first meeting held each year after the annual meeting of stockholders. If the election of officers shall not be held at such meeting, the election may be held as soon thereafter as may be convenient. Each officer shall hold office until his successor has been elected and qualified or until his death, resignation or removal from office in the manner hereinafter provided. 3. Removal. Any officer or agent elected or appointed by the Board of Directors may be removed at any time, with or without cause, whenever in its judgment the best interests of the corporation will be served thereby, but such removal shall be without prejudice to the contract rights, if any, of the person so removed. 4. Vacancies. A vacancy in any office because of death, resignation, removal, disqualification or otherwise may be filled by the Board of Directors for the unexpired portion of the term. 5. Chairman of the Board. The Board shall appoint one of its members to be Chairman of the Board, who may serve as the Chief Executive Officer of the corporation. Such person shall also preside at all meetings of the Board and all meetings of the shareholders and supervise the carrying out of the policies adopted or approved by the Board; shall have general executive powers, as well as the specific powers conferred by these Bylaws; and shall also have and may exercise such further powers and duties as from time to time may be conferred upon or assigned by the Board of Directors. 6. Vice Chairman of the Board. The Board may appoint one or more of its members to be Vice Chairman of the Board. In the absence of the Chairman, the Vice Chairman shall preside at any meeting of the Board. The Vice Chairman shall have general executive powers, and shall have and may exercise any and all other powers and duties as from time to time may be conferred, or assigned, by the Board of Directors. 7. President and Chief Executive Officer. The President and Chief Executive Officer shall have general supervision of the affairs of the corporation, shall sign or countersign all certificates, contracts and other instruments of the corporation as authorized by the Board of Directors, shall make reports to the Board of Directors and Stockholders, and shall perform all such other duties as are incident to his office or required of him by the Board of Directors. In the absence of the Chairman and Vice Chairman of the Board, the President and Chief Executive Officer shall preside at any meeting of the Board. [This section was put in its present form effective May 13, 1997.] 8. Vice President. The Board may appoint one or more Vice- Presidents of the corporation. In the absence of the President or in the event of his death, inability or refusal to act, a Vice President so designated by the Board shall perform the duties of the President and when so acting shall have all the powers of and be subject to all the restrictions upon the President. The Vice President or any additional or assistant Vice President shall perform such other duties as may be from time to time assigned by the President or by the Board of Directors. 9. Secretary. The Secretary shall keep the Minutes of the meetings of stockholders and of the Board of Directors and, upon request, of any committees of the Board of Directors, in one or more books provided for that purpose. He shall issue notices of all meetings, except notice of special meetings of directors called at the request of a majority of directors as provided in Section 5 of Article III of these Bylaws, which notice may be issued by such directors. He shall have charge of the seal and the corporate record books and shall make such reports and perform such other duties as are incident to his office, or which may be required of him by the Board of Directors. 10. Treasurer. The Treasurer shall have the custody of all funds and securities of the corporation and shall keep regular books of account. He shall receive and disburse all funds of the corporation and shall render to the Board of Directors from time to time as may be required of him an account of all his transactions as Treasurer and of the financial condition of the corporation. He shall perform all duties incident to his office or which may be required of him by the Board of Directors. 11. Salaries. The salaries of the officers shall be fixed from time to time by the Board of Directors. No officer shall be prevented from receiving such salary by reason of the fact that he is also a director of the corporation. 12. Delegation of Duties. In case of the death, absence, refusal, or inability to act of any officer of the corporation, the Board of Directors may from time to time delegate the powers or duties of such officer to any other officer, or to any director or other person. 13. Bonds. The Board of Directors may by resolution require any or all of the officers to give bonds to the corporation, with sufficient surety, conditioned on the faithful performance of the respective duties of the office and to comply with such other conditions as may be required by the Board of Directors. 14. Resignation. An officer may resign at any time by delivering notice to the Corporation. A resignation is effective when notice is given unless the notice specifies a later effective date. 15. Contractual Arrangements. Any contractual arrangement concerning compensation and/or employee benefits between the corporation and any officer must be approved by a majority of the full Board of Directors. 16. Executive Officers. The Chairman, Vice-Chairman (if any), President, any Vice President and Secretary shall be Executive Officers of the corporation. One or more of these officers may also be designated as Chief Executive Officer, Chief Financial Officer, Chief Operating Officer, or other officer by the Board of Directors. Other officers may be designated by the Board from time to time as Executive Officers, in accordance with the provisions of Paragraph (a) of Section 215.2 - "DEFINITIONS" of Regulation "O" (12 C.F.R. 215) of the Board of Governors of the Federal Reserve System. ARTICLE V CERTIFICATES FOR SHARES AND THEIR TRANSFER 1. Form of Certificate. Certificates representing shares of the corporation shall be in such form as may be determined by the Board of Directors. Such certificates shall be signed by the President and by the Secretary or by such other officers authorized by the Board of Directors, with the seal of the corporation affixed thereto. Signatures and the corporate seal may be facsimiles, but a facsimile signature may be used only if the certificate is countersigned by a transfer agent, or registered by a registrar, other than the corporation itself or an employee of the corporation. The Board of Directors may adopt or use procedures for replacing lost, stolen or destroyed stock certificates as permitted by law. 2. Registration. Registered stockholders only shall be entitled to be treated by the corporation as the holders in fact of the stock standing in their respective names, and the corporation shall not be bound to recognize any equitable or other claim to or interest in the share on the part of any other person, whether or not it shall have express or other notice thereof, except as expressly provided by the laws of Mississippi. 3. Closing of Transfer Books. For the purpose of determining stockholders entitled to notice of or to vote at any meeting of stockholders or any adjournment thereof, or entitled to receive payment of any dividend, or in order to make a determination of stockholders for any other proper purpose, the Board of Directors may provide that the stock transfer books shall be closed for a stated period, but not to exceed fifty (50) days. If the stock transfer books shall be closed for the purpose of determining stockholders entitled to notice of or to vote at a meeting of stockholders, such books shall be closed for at least ten (10) days immediately preceding such meeting. 4. Fixing Record Date. In lieu of closing the stock transfer books as described in Paragraph 3 herein, the Board of Directors may fix in advance a date as the record date for determining the shareholders entitled to notice of a shareholder meeting, to demand a special meeting, to vote or take any other action; provided, however, that in no event shall the record date fixed by the Board of Directors be more than fifty (50) days or less than ten (10) days before the meeting or action requiring a determination of shareholders, or a date preceding the date upon which the resolution fixing the record date is adopted. 4. Transfers of Stock. All transfers of stock of the corporation shall be made upon the books of the corporation by the holder of such shares in person, or by his legal representative, executor or administrator, only upon surrender of the certificate or certificates of stock for cancellation, properly endorsed. ARTICLE VI FINANCE 1. Fiscal Year. The fiscal year of the corporation shall begin on the 1st day of January and end on the 31st day of December of each year, unless otherwise provided by the Board of Directors. 2. Indemnity. Any person, his heirs, executors, or administrators, may be indemnified or reimbursed by the corporation for reasonable expenses actually incurred in connection with any action, suit, or proceeding, civil or criminal, to which he or they shall be made a party or potential party by reason of his being or having been a director, an honorary or advisory director, officer, or employee of the corporation or of any firm, corporation or organization which he served in any such capacity at the request of the corporation; provided, however, that no person shall be so indemnified or reimbursed in relation to any matter in such action, suit, or proceeding as to which he shall finally be adjudged to have been guilty of or liable for negligence or willful misconduct in the performance of his duties to the corporation; and provided further, that no person shall be so indemnified or reimbursed in relation to any administrative proceeding or action instituted by an appropriate bank regulatory agency which proceeding or action results in a final order assessing civil money penalties or requiring affirmative action by an individual or individuals in the form of payments to the corporation. The foregoing right of indemnification or reimbursement shall not be exclusive of other rights to which such person, his heirs, executors, or administrators, may be entitled as a matter of law. The corporation may, upon affirmative vote of a majority of its board of directors, purchase insurance to indemnify its directors, honorary or advisory directors, officers and employees. Such insurance may, but need not, be for the benefit of all directors, honorary or advisory directors, officers or employees. 3. Dividends. The Board of Directors may from time to time declare and the corporation may pay dividends on its outstanding shares in the manner and upon the terms and conditions as provided by law. 4. Affiliated Corporations. If the corporation should become affiliated with any bank or other business regulated by special provisions of law, the directors and officers shall, to the extent required by law, permit the examination of the corporation's records, disclose fully the relations between the corporation and such bank or other business and furnish reports and information. ARTICLE VII WAIVER Unless otherwise provided by law, whenever any notice is required to be given to any stockholder or director of the corporation, a waiver thereof in writing signed by the person or persons entitled to such notice, whether before or after the time stated therein, shall be deemed equivalent to the giving of such notice. ARTICLE VIII AMENDMENTS These Bylaws may be altered, amended or repealed or new Bylaws adopted by the Board of Directors.