5 U.S. Code § 8403
5 U.S. Code § 8403 is about Relationship to the Social Security Act. It is under Subchapter I (General Provisions) of Chapter 84 (Federal Employees’ Retirement system) of Subpart G (Insurance And Annuities) of Part III (Employees) of Title 5 (Government Organizations and Employees) of the Code.
Except as otherwise provided in this chapter, the benefits payable under the System are in addition to the benefits payable under the Social Security Act.