20 C.F.R. § 234.42 How the employee may designate beneficiaries.
Title 20 - Employees' Benefits
The employee may designate one or more persons as beneficiaries of the RLS on a form available at any Board office. The employee may specify the share that each beneficiary is to receive. Also, the employee may designate alternate beneficiaries in the event that all primary beneficiaries die before the RLS becomes payable.
Title 20: Employees' Benefits
PART 234—LUMP-SUM PAYMENTS
Subpart D—Residual Lump-Sum Payment
§ 234.42 How the employee may designate beneficiaries.