5 CFR §870.403

1. (a)Withholdings and contributions for Basic insurance for an individual who elects a full Living Benefit under subpart K of this part stop at the end of the pay period in which the Living Benefit election is effective.
2. (b)Withholdings and contributions for Basic insurance for an employee who elects a partial Living Benefit under subpart K of this part are based on the post-election BIA. This reduction in withholdings and contributions starts at the end of the pay period in which the Living Benefit election is effective.
3. (c)Withholdings and contributions for Basic insurance for an annuitant or compensationer who elected a partial Living Benefit as an employee are based on the post-election BIA.
4. (d)There is no change in withholdings for Optional insurance for individuals who elect a Living Benefit.