CFR›Title 20›Chapter II›Part 221 ContainsSections 221.1–221.4CorpusDaily eCFRDisplayed edition2026-08-20Last updated2026-08-20 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. AuthoritySec. 7(b)(1), Pub. L. 94-547 (45 U.S.C. 231f(b)(1)). Link to an amendment published at 91 FR 51385, Aug. 10, 2026.Source47 FR 7656, Feb. 22, 1982, unless otherwise noted. Previous 220 Part 220—Determining Disability Next 222 Part 222—Family Relationships