---
kind: "section"
citation: "20 C.F.R. § 225.20"
title: "20"
number: "225.20"
heading: "General."
url: "https://uscodex.org/cfr/20/225.20"
---

# §225.20. General.


The Survivor Tier I PIA and the Employee RIB PIA are used in computing the tier I component of a survivor annuity. The Combined Earnings PIA, Social Security Earnings PIA and Railroad Earnings PIA may be used in computing a vested dual benefit offset in the survivor tier II component when the survivor tier II is based on a percentage of the employee annuity tier II. In addition, these three PIA's are identical to those dual benefit PIA's used in computing an employee retirement annuity, as described in [subpart B](/cfr/20/subpartB.md) of this part, when the employee died after being entitled to an annuity. Survivor annuity computations are discussed in [part 228](/cfr/20/part228.md) of this chapter. The Residual Lump-Sum PIA (RLS PIA) is used in computing the amount of the residual lump-sum payable when retirement annuity payments were made, as explained in [part 234](/cfr/20/part234.md) of this chapter.


## Notes

### Authority

Authority: 45 U.S.C. 231f(b)(5).

### Source

Source: 54 FR 12903, Mar. 29, 1989, unless otherwise noted.