CFR›Title 20›Chapter II›Part 225›Subpart B ContainsSections 225.10–225.15CorpusDaily eCFRDisplayed edition2026-05-07Last updated2026-05-07 Subpart B—PIA's Used in Computing Employee, Spouse and Divorced Spouse Annuities Sections 225.10 § 225.10 General. 225.11 § 225.11 Tier I PIA. 225.12 § 225.12 Combined Earnings Dual Benefit PIA. 225.13 § 225.13 Social Security Earnings Dual Benefit PIA. 225.14 § 225.14 Railroad Earnings Dual Benefit PIA. 225.15 § 225.15 Overall Minimum PIA. Previous A Subpart A—General Next C Subpart C—PIA's Used in Computing Survivor Annuities and the Amount of the Residual Lump-Sum Payable