Regulations last checked for updates: Feb 04, 2026

Title 26 - Internal Revenue last revised: Jan 15, 2026
authority: Secs. 126 and 7805 of the Internal Revenue Code of 1954 (92 Stat. 2888, 26 U.S.C. 126; 68A Stat. 917, 26 U.S.C. 7805)
source: T.D. 7778, 46 FR 27637, May 21, 1981, unless otherwise noted.