CFR›Title 26›Chapter I›26 CFR Part 5f Citation26 CFR Part 5fContainsSections § 5f.103-1–§ 5f.163-1CorpusDaily eCFRDisplayed edition2026-09-23Last updated2026-09-23 PART 5f—TEMPORARY INCOME TAX REGULATIONS UNDER THE TAX EQUITY AND FISCAL RESPONSIBILITY ACT OF 1982 Sections § 5f.103-1 § 5f.103-1 Obligations issued after December 31, 1982, required to be in registered form. § 5f.163-1 § 5f.163-1 Denial of interest deduction on certain obligations issued after December 31, 1982, unless issued in registered form. Authority26 U.S.C. 7805. Secs. 5f.103-1 and 5f.163-1 also issued under 26 U.S.C. 103(j), 26 U.S.C. 163(f), and 96 Stat. 595.