20 C.F.R. § 228.19 Reduction for a social security benefit.
Title 20 - Employees' Benefits
The tier I annuity component is reduced for the amount of any social security benefit to which the survivor annuitant is entitled.
Title 20: Employees' Benefits
PART 228—COMPUTATION OF SURVIVOR ANNUITIES
Subpart B—The Tier I Annuity Component
§ 228.19 Reduction for a social security benefit.

