CFR›Title 20›Chapter II›20 CFR Part 221 Citation20 CFR Part 221ContainsSections § 221.1–§ 221.4CorpusDaily eCFRDisplayed edition2026-09-30Last updated2026-09-30 PART 221—JURISDICTION DETERMINATIONS Sections § 221.1 § 221.1 Introduction. § 221.2 § 221.2 Railroad Retirement Board jurisdiction. § 221.3 § 221.3 Social Security Administration jurisdiction. § 221.4 § 221.4 When a jurisdiction decision may be reversed. Authority45 U.S.C. 231f(b)(1), (b)(2); 45 U.S.C. 231f(d); 45 U.S.C. 231q.Source47 FR 7656, Feb. 22, 1982, unless otherwise noted. Previous 220 Part 220—Determining Disability Next 222 Part 222—Family Relationships