CFR›Title 26›Chapter I›Part 601›26 CFR Part 601 Subpart F Citation26 CFR Part 601 Subpart FContainsSections § 601.601–§ 601.602CorpusDaily eCFRDisplayed edition2026-08-05Last updated2026-08-05 Subpart F—Rules, Regulations, and Forms Sections § 601.601 § 601.601 Rules and regulations. § 601.602 § 601.602 Tax forms and instructions. Authority5 U.S.C. 301 and 552. Subpart I also issued under 39 U.S.C. 3220.Source32 FR 15990, Nov. 22, 1967, unless otherwise noted.