31 CFR § 29.346 - Reduction for survivor benefits.

If a retiree elects a reduction for a survivor annuity, the ratio of the unreduced Federal Benefit Payment to the unreduced total annuity is multiplied by the reduced total annuity to determine the reduced Federal Benefit Payment. (See example 10 of appendix A of this subpart.)

Calculation of the Split of Refunds of Employee Contributions and Deposits