Regulations last checked for updates: Jan 12, 2026

Title 26 - Internal Revenue last revised: Dec 16, 2026
authority: Sec. 511(b), 49 Stat. 1985, as amended, sec. 7805, 68A Stat. 917; 26 U.S.C. 7805,46.S.C. 1161(b)
source: T.D. 6820, 30 FR 6030, Apr. 29, 1965, unless otherwise noted.