Tenn. Code § 17-503
The general administration and responsibility for the proper operation of the retirement system and for making effective the provisions of this law are hereby vested in a retirement board, which shall consist of the state treasurer, the commissioner of finance and administration, the comptroller of the treasury, and three (3) members appointed by the governor, all of whom shall be members of the retirement system. The state treasurer shall be chairman of the board. The board shall elect one of its members as vice-chairman. A majority of the members of the board shall constitute a quorum, and all action taken by the board shall be by affirmative vote of a majority of all members of the board. The personnel required by the board in the administration of the plan shall be provided by the division of retirement of the state of Tennessee and all administrative duties shall be performed by and all administrative records shall be maintained by the division of retirement. The state attorney general or an assistant designated by him shall act as legal advisor and attorney for the board.
T.C.A. § 17-503