K.S.A. 73-206b

Any person entitled to a pension or annuity by reason of retirement pursuant to provisions of the laws of this state may decline to accept all or any part of such pension or annuity by a waiver signed by the pensioner or annuitant and filed with the body authorized by statute to administer the fund from which said pensioner or annuitant is receiving or is entitled to receive said pension or annuity, or its authorized agent. Such waiver may be revoked in writing at any time, but no payment of the pension or annuity or part thereof waived shall be made covering the period during which the waiver was in effect.