Once a municipal corporation or special school district has provided an insurance program under this part, such program may not be discontinued in its entirety unless the governing body of the municipal corporation or special school district shall so decide by a vote on such resolution; and then the program may not be discontinued in its entirety until the employees and officials of such municipal corporations or special school districts have been given at least three (3) months' notice.
T.C.A. § 8-27-606