Tenn. Code § 8-27-605
The aldermen or other governing body of the municipal corporation or special school district shall appropriate from the funds of the municipal corporation or special school district an amount annually which shall be sufficient to pay the municipal corporation's or special school district's portion of such insurance premiums. These amounts shall be remitted periodically as required to the treasurer of the municipal corporation or special school district and shall be deposited in a fund to be known as the "insurance fund." The amounts deducted from the salaries of participating municipal corporation or special school district employees and officials shall also be deposited to the insurance fund within three (3) days after the amount has been deducted, and from this fund, the cost of the insurance program shall be paid upon a warrant drawn by the mayor or chief executive officer; provided, that in the case of special school districts, the matching funds provided by the governing body and the amounts deducted from the salaries of the participating special school district employees and officials may be accounted for by creating a special account within the regular school operating fund and the special "insurance fund" referred to above need not be maintained.
T.C.A. § 8-27-605