5 C.F.R. § 847.415 OASDI coverage.
Title 5 - Administrative Personnel
An employee who elects CSRS coverage under §847.411 is prospectively subject to both the Old Age, Survivors, and Disability Insurance (OASDI) tax and CSRS as described in subpart J of part 831 of this chapter, known as CSRS Offset, effective from the first day of the next pay period after the employing agency receives the employee's election under §847.411(a).
Title 5: Administrative Personnel
PART 847—ELECTIONS OF RETIREMENT COVERAGE BY CURRENT AND FORMER EMPLOYEES OF NONAPPROPRIATED FUND INSTRUMENTALITIES
Subpart C—Procedures for Elections Under the Retroactive Provisions
Elections of CSRS or FERS Coverage Based on a Move From CSRS or FERS to NAFI
§ 847.415 OASDI coverage.
