Code of Federal Regulations Title 26, Volume 4, April 1, 2017 contains regulations governing Internal Revenue and may also be referenced as: - Code of Federal Regulations Title 26, Volume 4, April 1, 2017 - CFR Title 26 - CFR 26, Internal Revenue - CFR 26, Part 1, §§ 1.170 to 1.300, Internal Revenue This volume contains Part 1, §§ 1.170 to 1.300: - Part 1; INCOME TAXES (CONTINUED)