(1) Upon completion of employment, a previously retired member who is reinstated with the same benefit amount that the retired member was receiving at the time of retirement, shall also have his/her retirement effective date reinstated to the original retirement effective date for the purpose of determining eligibility for the guaranteed annual benefit adjustment (GABA) .

(2) If upon termination of employment the previously retired member's retirement benefits are recalculated, his/her retirement effective date, for the purpose of determining eligibility for GABA, will be the most recent date of retirement.