5 C.F.R. § 843.402 Eligibility requirements.
Title 5 - Administrative Personnel
A surviving child of an employee or retiree who dies after completing 18 months of civilian service creditable under FERS is entitled to an annuity under this subpart.
Title 5: Administrative Personnel
PART 843—FEDERAL EMPLOYEES RETIREMENT SYSTEM—DEATH BENEFITS AND EMPLOYEE REFUNDS
Subpart D—Child Annuities
§ 843.402 Eligibility requirements.