5 U.S.C. § 8432c — Contributions of certain persons reemployed after service with international organizations

(a) Who counts as a "covered person." A "covered person" is someone who: (1) transferred from a job covered by chapter 83 or 84 (the two federal retirement systems) or certain Foreign Service^* Act provisions, to a job with an international organization, under section 3582; (2) chose under section 3582 to keep their federal retirement coverage during that international-organization job, and kept paying the required deductions into that system's fund^*; and (3) later got reemployed, under section 3582(b), into a job covered by chapter 83 or 84 or those Foreign Service Act provisions, after leaving the international organization.

(b) Making up contributions.
(1) A covered person may contribute to the Fund up to the limit in paragraph (2).
(2) That maximum equals: (A) all the contributions the person would have made under section 8351(b)(2) or 8432(a) (whichever applied) between the date they transferred and the day before they were reemployed, minus (B) any contributions they actually made under those sections during that period.
(3) These contributions: (A) are made the same way as regular contributions under 8351(b)(2) or 8432(a); (B) are spread over whatever period the person chooses under paragraph (4)(B); and (C) are in addition to any contributions the person is currently making.
(4) The Executive Director^* sets the process for the person to specify (A) how much they want to contribute for the earlier period, and (B) how long they want to take to pay it in.

(c) Agency matching. If a covered person who's contributing under section 8432(a) also makes these make-up contributions, their employing agency must match them the same way it would for an employee^* covered by section 8432b, following that section's rules in subsections (c), (d), and (f), and pay them the same way section 8432b(g) requires.

(d) Figuring the pay rate. For these calculations, the covered person is treated as if they had kept earning the pay of the job they held right before transferring to the international organization, for the whole period they were away.

(e) Vesting credit. For purposes of the vesting rules in section 8432(g), the covered person is credited with civilian service for the whole period between their transfer date and the day before their reemployment date.

(f) The Executive Director^* must issue regulations to carry out this section.