The three (3) appointed members who are teachers shall be appointed from a list of teachers, nominated by the representative assembly of the Tennessee education association, who are teachers in service in schools or institutions supported in whole or in part by state appropriations. One shall be appointed from a list of three (3) nominated from each of the three (3) grand divisions of the state.
If a vacancy occurs in the office of a trustee, the vacancy shall be filled for the unexpired term in the same manner as the office was previously filled.
T.C.A. § 49-1503