5 CFR 841.803 - Waiver of annuity.
(c) A waiver remains in effect until revoked or changed by the annuitant in writing, except as provided in paragraph (f) of this section. The effective date of a revocation or change will be the first day of the month following the month in which the request to revoke or change is received in OPM, unless a later date is specified by the annuitant.
(e) An annuity which has a waiver in effect will not be increased by cost-of-living adjustments (COLA) authorized under 5 U.S.C. 8462. Upon cancellation of a waiver, the rate of annuity will be increased by any COLA authorized during the period a waiver was in effect.
(f) Upon the death of an annuitant with a waiver in effect, any survivor annuity payable will be authorized at the full rate of annuity as though the waiver had not been in effect, unless the survivor annuitant executes a waiver.