Tenn. Code § 65-156
A board of trustees is hereby established which shall be responsible for the proper administration and operation of the public service commissioners' retirement system provided by §§ 65-151 - 65-168.
Such board of trustees shall have as members the chairman of the public service commission or any member of the public service commission designated by him, the state treasurer, the comptroller of the treasury, the commissioner of finance and administration and one (1) member appointed by the governor. 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.
T.C.A. § 65-156