5 C.F.R. § 837.501 Refund of retirement deductions.
Title 5 - Administrative Personnel
A reemployed annuitant who separates from reemployment without title to either a supplemental annuity or a redetermined annuity under this subpart is entitled to have any retirement deductions withheld from pay during the period of reemployment refunded without interest.
Title 5: Administrative Personnel
PART 837—REEMPLOYMENT OF ANNUITANTS
Subpart E—Retirement Benefits on Separation
§ 837.501 Refund of retirement deductions.