5 CFR §847.443
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
An employee who elects NAFI retirement system coverage with credit for FERS service under § 847.441(a) is excluded from coverage under FERS during that and all subsequent periods of employment, including any periods of service as a reemployed annuitant.