(1) At retirement the total service credited to a teacher shall consist of prior and subsequent service rendered by him or her for which service credit has been allowed.
(2) Kentucky service, presented at the time of retirement, may not be used in calculating benefits under KRS 161.525, 161.620, or 161.661, if such service has been used to increase benefits in another retirement system, not including Old Age and Survivors Insurance Benefits under the Social Security Administration.
(3) No service credit shall be added to a member's account after the effective date of retirement for service.