CFR›Title 20›Chapter II›Part 228 ContainsSubparts A–CCorpusDaily eCFRDisplayed edition2026-07-02Last updated2026-07-02 PART 228—COMPUTATION OF SURVIVOR ANNUITIES Subparts A Subpart A—General Sections 228.1–228.2 B Subpart B—The Tier I Annuity Component Sections 228.10–228.40 C Subpart C—The Tier II Annuity Component Sections 228.50–228.60 Authority45 U.S.C. 231f.Source60 FR 16368, Mar. 30, 1995, unless otherwise noted. Previous 227 Part 227—Computing Supplemental Annuities Next 229 Part 229—Social Security Overall Minimum Guarantee