Any person awarded an annuity under this subchapter may decline to accept all or any part of such annuity by a waiver signed and filed with the Board. Such a waiver may be revoked in writing at any time, but no payment of the annuity waived shall be made covering the period during which such waiver was in effect. Such a waiver will have no effect on entitlement to, or the amount of, any other annuity or benefit.
(Aug. 29, 1935, ch. 812, §11, as restated June 24, 1937, ch. 382, pt. I,