5 C.F.R. § 843.502 Eligibility.
Title 5 - Administrative Personnel
An insurable interest beneficiary is eligible for an annuity under this subpart upon the death of a retiree if the retiree had elected (under §842.606 of this chapter) to receive an insurable interest rate with the insurable interest beneficiary as his or her survivor.
Title 5: Administrative Personnel
PART 843—FEDERAL EMPLOYEES RETIREMENT SYSTEM—DEATH BENEFITS AND EMPLOYEE REFUNDS
Subpart E—Insurable Interest Annuities
§ 843.502 Eligibility.