Chapter I, Subchapter A – INCOME TAX
- Part 1 – INCOME TAXES
- Part 2 – MARITIME CONSTRUCTION RESERVE FUND
- Part 3 – CAPITAL CONSTRUCTION FUND
- Part 4 – TEMPORARY INCOME TAX REGULATIONS UNDER SECTION 954 OF THE INTERNAL REVENUE CODE
- Part 5 – TEMPORARY INCOME TAX REGULATIONS UNDER THE REVENUE ACT OF 1978
- Part 5c – TEMPORARY INCOME TAX REGULATIONS UNDER THE ECONOMIC RECOVERY TAX ACT OF 1981
- Part 5e – TEMPORARY INCOME TAX REGULATIONS, TRAVEL EXPENSES OF MEMBERS OF CONGRESS
- Part 5f – TEMPORARY INCOME TAX REGULATIONS UNDER THE TAX EQUITY AND FISCAL RESPONSIBILITY ACT OF 1982
- Part 6a – TEMPORARY REGULATIONS UNDER TITLE II OF THE OMNIBUS RECONCILIATION ACT OF 1980
- Part 7 – TEMPORARY INCOME TAX REGULATIONS UNDER THE TAX REFORM ACT OF 1976
- Part 8 – TEMPORARY INCOME TAX REGULATIONS UNDER SECTION 3 OF THE ACT OF OCTOBER 26, 1974 (PUB. L. 93-483)
- Part 9 – TEMPORARY INCOME TAX REGULATIONS UNDER THE TAX REDUCTION ACT OF 1975
- Part 11 – TEMPORARY INCOME TAX REGULATIONS UNDER THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974
- Part 12 – TEMPORARY INCOME TAX REGULATIONS UNDER THE REVENUE ACT OF 1971
- Part 13 – TEMPORARY INCOME TAX REGULATIONS UNDER THE TAX REFORM ACT OF 1969
- Part 15 – TEMPORARY INCOME TAX REGULATIONS RELATING TO EXPLORATION EXPENDITURES IN THE CASE OF MINING
- Part 15a – TEMPORARY INCOME TAX REGULATIONS UNDER THE INSTALLMENT SALES REVISION ACT
- Part 16 – TEMPORARY REGULATIONS UNDER THE REVENUE ACT OF 1962
- Part 16A – TEMPORARY INCOME TAX REGULATIONS RELATING TO THE PARTIAL EXCLUSION FOR CERTAIN CONSERVATION COST-SHARING PAYMENTS
- Part 18 – TEMPORARY INCOME TAX REGULATIONS UNDER THE SUBCHAPTER S REVISION ACT OF 1982
- Part 19 – TEMPORARY REGULATIONS UNDER THE REVENUE ACT OF 1964