Tennessee Code Title 2. Elections § 2-13-110

(a) Each state primary board shall appoint the members of its county primary boards from lists submitted by the county executive committees.

(b) Where the list submitted by the county executive committee is not divided fairly among the elements of the party, the state primary board may appoint two (2) members of the county primary board without regard for the list, but it shall appoint the other three (3) members from the list submitted by the county executive committee.

(c) If no list is submitted, the state primary board shall draw up its own list of nominees from which it shall appoint the county primary board for that county or it may designate the county election commission to act as its county primary board.