Chapter I-i 18. CHAPTER I—INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED)

• PART 50 [§ 50.1 - § 50.8] - PART 50—REGULATIONS RELATING TO THE TAX IMPOSED WITH RESPECT TO CERTAIN HYDRAULIC MINING
• PART 51 [§ 51.1 - § 51.6302-1] - PART 51—BRANDED PRESCRIPTION DRUG FEE
• PART 52 [§ 52.0-1 - § 52.4682-5] - PART 52—ENVIRONMENTAL TAXES
• PART 53 [§ 53.4940-1 - § 53.7701-1] - PART 53—FOUNDATION AND SIMILAR EXCISE TAXES
• PART 54 [§ 54.4971-1 - § 54.9833-1] - PART 54—PENSION EXCISE TAXES
• PART 55 [§ 55.4981-1 - § 55.7701-1] - PART 55—EXCISE TAX ON REAL ESTATE INVESTMENT TRUSTS AND REGULATED INVESTMENT COMPANIES
• PART 56 [§ 56.4911-0 - § 56.7701-1] - PART 56—PUBLIC CHARITY EXCISE TAXES
• PART 57 [§ 57.1 - § 57.6302-1] - PART 57—HEALTH INSURANCE PROVIDERS FEE
• PART 58 [§ 58.6001-1 - § 58.6696-1] - PART 58—STOCK REPURCHASE EXCISE TAX
• PART 141 [§ 141.4975-13 - § 141.4975-13] - PART 141—TEMPORARY EXCISE TAX REGULATIONS UNDER THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974
• PART 143 [§ 143.1 - § 143.6] - PART 143—TEMPORARY EXCISE TAX REGULATIONS UNDER THE TAX REFORM ACT OF 1969
• PART 145 [§ 145.4051-1 - § 145.4061-1] - PART 145—TEMPORARY EXCISE TAX REGULATIONS UNDER THE HIGHWAY REVENUE ACT OF 1982 (PUB. L. 97-424)
• PART 151-155 - PARTS 151-155 [RESERVED]
• PART 156 [§ 156.5881-1 - § 156.7701-1] - PART 156—EXCISE TAX ON GREENMAIL
• PART 157 [§ 157.5891-1 - § 157.7701-1] - PART 157—EXCISE TAX ON STRUCTURED SETTLEMENT FACTORING TRANSACTIONS
• PART 158-169 - PARTS 158-169 [RESERVED]
• PART 170-299 - PARTS 170-299 [RESERVED]