Georgia Code Title 47. Retirement and Pensions § 47-4-41

(1) Any such local unit of administration must make the election as to whether or not any or all of its public school employees covered by its local retirement or pension system shall become members of the retirement system created by Code Section 47-4-20, and such election must be made in writing to the board by April 1, 1970; and

(2) If any such local unit of administration elects to have any or all of its public school employees become members of the retirement system created by Code Section 47-4-20 then, at a time to be specified by the board, such employees shall cease to be members of the local retirement or pension system and shall become members of this retirement system. Upon retirement, all service credited to such employees under the local retirement or pension system shall be creditable service; and such employees shall receive retirement benefits under this chapter. The transfer of any such public school employee from any local retirement or pension system to this retirement system shall not impair or diminish any pension or retirement rights of any such employee existing under the local retirement or pension system at the time of such transfer; and in order to carry out this requirement, the local unit of administration shall pay to the board, in such manner and at such time or times as the board shall specify, an amount which shall be of sufficient actuarial value to secure the pension or retirement rights any such employee had under the local retirement or pension system. Upon retirement, such employee shall receive a retirement benefit equivalent in actuarial value to the retirement or pension benefit which he would have received under the local system, notwithstanding the retirement benefits otherwise set forth in this chapter.