53 Pa. Stat. § 881.103
A Pennsylvania Municipal Retirement Board is hereby created, which shall consist of the State Treasurer, Secretary of the Commonwealth, six municipal elected officials or employes of different classes of municipalities which have joined the system, one retired member of the system who is receiving a retirement allowance, one municipal fireman employed by a municipality which has joined the system and one municipal policeman employed by a municipality which has joined the system. The nine latter members shall be appointed by the Governor from among nominations made by the County Commissioners Association, the Pennsylvania League of Cities, the Pennsylvania Association of Township Commissioners, the Pennsylvania State Association of Township Supervisors, the Pennsylvania State Association of Boroughs and the Pennsylvania Municipal Authorities Association, and associations representing municipal firemen and municipal police, to serve for a term of four years each and until their successors are appointed and qualified. Appointments of members made by the Governor shall not require the advice and consent of the Senate. The two municipal employe members of the Municipal Employes' Retirement Board, appointed by the Governor from among nominations made by various associations of county and municipal officers, who are serving on the effective date of this act, shall continue to serve as members of the Pennsylvania Municipal Retirement Board until the expiration of their respective terms.
A chairman and vice chairman of the board shall be elected by the board every year at the January meeting of the board and the chairman and vice-chairman may succeed themselves for the appointed term of four years.
Vacancies happening from among members appointed from among the nominations made by the associations shall be filled by the appointment of a successor for a full term of four years.
No appointed member shall serve more than two consecutive full terms.
Each member of the board shall take an oath of office that he will diligently and honestly administer the affairs of the board, and that he will not knowingly violate or wilfully permit to be violated any of the provisions of this act.
A quorum of the board shall consist of six members.
53 P.S. § 881.103