Tenn. Code Ann. § 2-7-122: Management of machine during voting

(a) The voting machine operator shall inspect the face of the machine after every voter has voted to ascertain that the ballot labels are in their proper places and that the machine has not been injured or tampered with. The operator shall remove any campaign literature left in the machine booth.

(b) During the election the door or other compartment of the machine may not be unlocked or opened or the counters exposed except by the voting machine technician or other authorized person, a statement of which shall be made and signed by the voting machine technician or authorized person and attached to the returns.