Chap. 0109 An Act relative to the membership of the board of zoning adjustment of the city of boston. Be it enacted, etc., as follows: Section 1. Section 20 of chapter 488 of the acts of 1924, as most recently amended by section 1 of chapter 328 of the acts of 1950, is hereby further amended by striking out the first four sentences and inserting in place thereof the following: -There shall be in the city of Boston a board, known as the Board of Zoning Adjustment, consisting of the chairman of the city planning board, ex officio, and eleven other members, and eleven alternates, appointed by the mayor as follows: - one member from two candidates, and one alternate from two other candidates, nominated by the Associated Industries of Massachusetts, one member from two candidates, and one alternate from two other candidates, nominated by the Boston Central Labor Union, one member from two candidates, and one alternate from two other candidates, nominated by the Boston Chamber of Commerce, one member from two candidates, and one alternate from two other candidates, nominated by the Boston Real Estate Board, one member from two candidates, and one alternate from two other candidates, nominated by the Massachusetts Real Estate Association, one member from two candidates, and one alternate from two other candidates, nominated, both in the case of the member and in the case of the alternate, one by the Boston Society of Architects and one by the Boston Society of Landscape Architects, one member from two candidates, and one alternate from two other candidates, nominated by the Boston Society of Civil Engineers, one member from two candidates, and one alternate from two other candidates, nominated by the Master Builders' Association of Boston, one member from two candidates, and one alternate from two other candidates, nominated by the Massachusetts Motor Truck Association, Inc., one member from two candidates, and one alternate from two other candidates, nominated by the United Improvement Association, and one member, and one alternate, selected at large by the mayor. All appointive members, and all alternates, shall be residents of or engaged in business in Boston. As the term of any appointive member expires, his successor shall be appointed in like manner as such member for a term of five years. Any vacancy in the office of an appointive member shall be filled in the same manner for the unexpired term. As the term of any alternate expires, his successor shall be appointed in like manner as such alternate. Any vacancy in the office of an alternate shall be filled in the same manner. Every person appointed an alternate shall be so appointed that his term will expire at the same time as the term of the incumbent member appointed in the same manner as such alternate. Whenever there is a vacancy in the office of an appointive member, or whenever an ap- pointive member is absent or unable from any cause to perform his duties, the alternate appointed in the same manner as such member shall exercise the powers and perform the duties of such member; but an alternate shall not otherwise be deemed to be, or act as, a member of the board. Section 2. The tenures of the appointive members of the board of zoning adjustment of the city of Boston in office when this act takes effect shall not be affected thereby; but they shall serve according to the provisions of their respective appointments. Section 3. This act shall take effect upon its passage. Approved February 28, 1952.