| 12/31/1975 | Definition of Flammable & Combustible Liquids | HM-133 | FR | 40 FR 60030 |
| 12/29/1975 | Asphalts in Cargo Tanks | HM-132 | FR | 40 FR 59598 |
| 12/16/1975 | Carriage of Certain Hazardous Materials on Cargo-Only Aircraft as Only Means of Transportation | HM-HM-128 | FR | 40 FR 58284 |
| 12/11/1975 | Proposed Inspection and Monitoring Requirements for Radioactive Materials | HM-HM-131 | NPRM | 40 FR 57688 |
| 12/10/1975 | Definition of Flammable, Combustible, & Pyrophoric Liquids | HM-102 | FR | 40 FR 57433 |
| 12/3/1975 | Exemption Procedures | HM-HM-127 | FR | 40 FR 56442 |
| 11/7/1975 | Matter Incorporated by Reference | HM-22 | FR | 40 FR 52037 |
| 11/7/1975 | Portable Tank Marking | HM-HM-129 | FR | 40 FR 52027 |
| 11/7/1975 | Portable Tank Gross Weights | HM-HM-130 | FR | 40 FR 52027 |
| 10/15/1975 | Establishment of Exemption Procedures | HM-HM-127 | FR | 40 FR 48466 |
| 10/15/1975 | Establishment of Exemption Procedures (clearer) | HM-HM-127 | FR | 40 FR 48467 |
| 10/15/1975 | Establishment of Exemption Procedures (clearer) | HM-HM-127 | FR | 40 FR 48468 |
| 10/15/1975 | Establishment of Exemption Procedures (clearer) | HM-HM-127 | FR | 40 FR 48469 |
| 10/15/1975 | Establishment of Exemption Procedures (clearer) | HM-HM-127 | FR | 40 FR 48470 |
| 10/15/1975 | Establishment of Exemption Procedures (clearer) | HM-HM-127 | FR | 40 FR 48471 |
| 10/15/1975 | Establishment of Exemption Procedures (clearer) | HM-HM-127 | FR | 40 FR 48472 |
| 10/15/1975 | Establishment of Exemption Procedures (clearer) | HM-HM-127 | FR | 40 FR 48473 |
| 10/15/1975 | Establishment of Exemption Procedures (clearer) | HM-HM-127 | FR | 40 FR 48474 |
| 10/6/1975 | Repair and Maintenance of Vehicles; Highway | HM-110 | FR | 40 FR 46106 |
| 10/1/1975 | Carriage of Hazardous Materials Aboard Aircraft | HM-HM-128 | NPRM | 40 FR 45197 |
| 9/30/1975 | Repair and Maintenance of Vehicles; Highway | HM-110 | FR | 40 FR 44821 |
| 9/30/1975 | Repair and Maintenance of Vehicles; Highway | HM-110 | NPRM | 40 FR 44842 |
| 9/30/1975 | MC 330 and MC 331 Cargo Tanks Stress Corrosion Cracking | HM-HM-113 | FR | 40 FR 44820 |
| 9/26/1975 | Miscellaneous Amendments - RAM | HM-111 | FR | 40 FR 44327 |
| 9/26/1975 | Hazard Information Systems | HM-126 | ANPRM | 40 FR 44336 |
| 9/8/1975 | Consolidation of Hazardous Materials Regulations | HM-112 | NPRM | 40 FR 41537 |
| 9/8/1975 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 40 FR 41527 |
| 9/2/1975 | Matter Incorporated by Reference | HM-22 | NPRM | 40 FR 40171 |
| 8/26/1975 | Matter Incorporated by Reference | HM-22 | FR | 40 FR 37214 |
| 8/26/1975 | Proposed Exemption Procedures; Public hearing | HM-127 | NPRM | 40 FR 37247 |
| 8/4/1975 | Proposed Exemption Procedures | HM-127 | NPRM | 40 FR 32758 |
| 7/30/1975 | Exemptions from Hazardous Materials Regulations | HM-127 | IFR | 40 FR 31976 |
| 6/25/1975 | Hazard Information System | HM-103 | NPRM | 40 FR 26687 |
| 6/25/1975 | Hazard Information Systems | HM-126 | ANPRM | 40 FR 26688 |
| 6/12/1975 | Definition of Flammable, Combustible, & Pyrophoric Liquids | HM-102 | FR | 40 FR 25024 |
| 6/11/1975 | MC 330 and MC 331 Cargo Tanks Stress Corrosion Cracking | HM-113 | FR | 40 FR 24902 |
| 6/9/1975 | Proposed DOT Specification Packaging | HM-130 | NPRM | 40 FR 24532 |
| 5/27/1975 | Matter Incorporated by Reference | HM-22 | NPRM | 40 FR 22842 |
| 5/22/1975 | Definition of Flammable, Combustible, & Pyrophoric Liquids | HM-102 | FR | 40 FR 22263 |
| 5/22/1975 | Tank Car Tank Head Shields | HM-109 | NPRM | 40 FR 22273 |
| 5/16/1975 | Repair and Maintenance of Vehicles; Highway | HM-110 | NPRM | 40 FR 21485 |
| 4/30/1975 | Matter Incorporated by Reference | HM-22 | FR | 40 FR 18788 |
| 4/23/1975 | Tank Car Tank Head Shields | HM-109 | NPRM | 40 FR 17855 |
| 4/23/1975 | Prohibit Construction of 112A/114A Tank Cars | HM-125 | NPRM | 40 FR 17853 |
| 3/26/1975 | Bottom Outlets Valves on MC 312 Cargo Tanks | HM-124 | NPRM | 40 FR 13316 |
| 3/18/1975 | Repair and Maintenance of Vehicles; Highway | HM-110 | FR | 40 FR 12269 |
| 3/11/1975 | Tank Car Tank Head Shields | HM-109 | NPRM | 40 FR 11362 |
| 2/5/1975 | Consolidation of Hazardous Materials Regulations | HM-112 | NPRM | 40 FR 5386 |
| 1/29/1975 | Consolidation of Hazardous Materials Regulations | HM-112 | NPRM | 40 FR 4329 |
| 1/29/1975 | Portable Tank Lettering Height | HM-129 | NPRM | 40 FR 4318 |
| 1/28/1975 | Hazard Information System and Miscellaneous Proposals | HM-103 | NPRM | 40 FR 4183 |
| 12/31/1974 | Miscellaneous Amendments - RAM | HM-111 | FR | 39 FR 45238 |
| 12/30/1974 | Fire Extinguishers | HM-106 | FR | 39 FR 44989 |
| 12/30/1974 | I-Bars on Steel Drums | HM-121 | FR | 39 FR 44989 |
| 12/17/1974 | Matter Incorporated by Reference | HM-22 | NPRM | 39 FR 43638 |
| 12/12/1974 | Shippers - Rail Freight | HM-123 | FR | 39 FR 43310 |
| 12/10/1974 | Hazard Information System and Miscellaneous Proposals | HM-HM-103 | NPRM | 39 FR 43091 |
| 12/5/1974 | Appl. of Regulations to Private & Contract Carriers | HM-122 | FR | 39 FR 42366 |
| 12/2/1974 | Repair and Maintenance of Vehicles; Highway | HM-110 | FR | 39 FR 41741 |
| 12/2/1974 | Matter Incorporated by Reference | HM-22 | FR | 39 FR 41744 |
| 11/27/1974 | Rail Cars used to Transport Class A Explosives | HM-114 | FR | 39 FR 41365 |
| 10/22/1974 | Definition of Flammable, Combustible, & Pyrophoric Liquids | HM-102 | FR | 39 FR 37488 |
| 10/22/1974 | Use of Certain Packagings | HM-121 | FR | 39 FR 11490 |
| 10/11/1974 | Use of Certain Packagings | HM-121 | NPRM | 39 FR 36596 |
| 9/30/1974 | Matter Incorporated by Reference | HM-22 | FR | 39 FR 35173 |
| 9/30/1974 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 39 FR 35172 |
| 9/20/1974 | Switching of Freight Cars | HM-120 | NPRM | 39 FR 33808 |
| 9/18/1974 | Miscellaneous Amendments to Chapter | HM-56 | FR | 39 FR 33532 |
| 9/12/1974 | Tank Car Tank Head Shields | HM-109 | FR | 39 FR 32912 |
| 9/10/1974 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 39 FR 32615 |
| 9/10/1974 | Cryogenic Liquids | HM-115 | ANPRM | 39 FR 32624 |
| 8/27/1974 | Consolidation of Hazardous Materials Regulations and Miscellaneous Proposals | HM-103; HM-112 | NPRM | 39 FR 30941 |
| 8/21/1974 | Matter Incorporated by Reference | HM-22 | FR | 39 FR 30135 |
| 8/14/1974 | Switching of Freight Cars | HM-120 | NPRM | 39 FR 29197 |
| 7/31/1974 | Polyethylene Drum | HM-119 | NPRM | 39 FR 27693 |
| 7/23/1974 | Tank Car Tank Head Shields | HM-109 | FR | 39 FR 27572 |
| 7/9/1974 | Expandable Polystyrene Resin and the Definition of a Flammable Solid | HM-118 | NPRM | 39 FR 25235 |
| 7/8/1974 | Ethylene Oxide; Opening in Tank Car Heads | HM-100 | FR | 39 FR 24909 |
| 6/24/1974 | Tank Car Utilization | HM-105 | FR | 39 FR 22425 |
| 6/14/1974 | Specification IM Glass Carboy in Polystyrene Packaging and Cancellation of Certain Obsolete Specification Packagings | HM-117 | NPRM | 39 FR 20805 |
| 5/28/1974 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 39 FR 18461 |
| 5/15/1974 | Shipment of Hazardous Materials | HM-106 | FR | 39 FR 17313 |
| 5/9/1974 | Consolidation of Hazardous Materials Regulations | HM-103; HM-112 | NPRM | 39 FR 16481 |
| 4/30/1974 | Tank Car Utilization | HM-105 | FR | 39 FR 15034 |
| 4/24/1974 | Consolidation of Hazardous Materials Regulations | HM-112 | NPRM | 39 FR 14519 |
| 4/23/1974 | Matter Incorporated by Reference | HM-22 | NPRM | 39 FR 14357 |
| 4/9/1974 | Miscellaneous Amendments | HM-104 | FR | 39 FR 12749 |
| 4/4/1974 | Proposed Classification of New Explosives and Shipment of Samples of Explosives | HM-116 | NPRM | 39 FR 12261 |
| 4/2/1974 | Matter Incorporated by Reference | HM-22 | NPRM | 39 FR 12034 |
| 3/22/1974 | Matter Incorporated by Reference | HM-22 | FR | 39 FR 10909 |
| 3/1/1974 | Cryogenic Liquids | HM-115 | ANPRM | 39 FR 7950 |
| 2/28/1974 | Cargo Tank Use and Testing, Compressed Gases in Portable and Cargo Tanks, and Specification MC 331 | HM-86 | FR | 39 FR 11423 |
| 2/26/1974 | Specifications for Tank Cars | HM-90 | NPRM | 39 FR 7432 |
| 2/6/1974 | Rail Cars used to Transport Class A Explosives | HM-114 | NPRM | 39 FR 4668 |
| 1/24/1974 | Definition of Flammable, Combustible, & Pyrophoric Liquids | HM-102 | FR | 39 FR 2768 |
| 1/24/1974 | Consolidation of Hazardous Materials Regulations | HM-112 | NPRM | 39 FR 3022 |
| 1/24/1974 | Hazard Information System and Miscellaneous Proposals; Notice of Proposed Rule Making | HM-103 | NPRM | 39 FR 3164 |
| 1/15/1974 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 39 FR 1851 |
| 1/4/1974 | MC 330 and MC 331 Cargo Tanks Stress Corrosion Cracking | HM-113 | NPRM | 39 FR 1059 |
| 12/28/1973 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 38 FR 35467 |
| 11/28/1973 | Matter Incorporated by Reference | HM-22 | NPRM | 38 FR 32817 |
| 10/25/1973 | Miscellaneous Amendments - RAM | HM-111 | NPRM | 38 FR 29483 |
| 10/12/1973 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 38 FR 28292 |
| 10/5/1973 | Cargo Tank Use and Testing, Compressed Gases in Portable and Cargo Tanks, and Specification MC 331 | HM-86 | FR | 38 FR 27595 |
| 9/11/1973 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | NPRM | 38 FR 24915 |
| 9/4/1973 | Miscellaneous Amendments to Chapter | HM-56 | FR | 38 FR 23791 |
| 8/27/1973 | Repair and Maintenance of Vehicles; Highway | HM-110 | NPRM | 38 FR 22901 |
| 8/15/1973 | Specification 3AX, 3AAX, & 3T Cylinders | HM-99 | FR | 38 FR 21989 |
| 8/3/1973 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 38 FR 20837 |
| 7/27/1973 | Shipment of Hazardous Materials | HM-97 | FR | 38 FR 20083 |
| 7/18/1973 | Matter Incorporated by Reference | HM-22 | FR | 38 FR 19125 |
| 6/27/1973 | Phosphorous Pentasulfide | HM-80 | FR | 38 FR 16875 |
| 5/29/1973 | Safety Vents | HM-108 | ANPRM | 38 FR 14111 |
| 5/29/1973 | Tank Car Tank Head Shields | HM-109 | NPRM | 38 FR 14112 |
| 5/16/1973 | Proposed Classification & Pkg. of Corrosive Liquids | HM-57 | FR | 38 FR 12807 |
| 5/3/1973 | Transportation of Hazardous Materials | HM-106 | NPRM | 38 FR 10960 |
| 4/24/1973 | Definition of Flammable, Combustible, & Pyrophoric Liquids | HM-102 | NPRM | 38 FR 10118 |
| 4/24/1973 | Hazard Information System | HM-103 | ANPRM | 38 FR 10117 |
| 4/23/1973 | Matter Incorporated by Reference | HM-22 | NPRM | 38 FR 10014 |
| 3/29/1973 | Etiologic Agents | HM-96 | FR | 38 FR 8161 |
| 3/23/1973 | DOD Materials Sold to Shippers | HM-107 | FR | 38 FR 7561 |
| 3/22/1973 | Transportation of Hazardous Materials | HM-106 | NPRM | 38 FR 7470 |
| 3/7/1973 | Labeling & Classing of HM | HM-8 | FR | 38 FR 6180 |
| 2/27/1973 | Labeling & Classing of HM | HM-8 | FR | 38 FR 5292 |
| 2/14/1973 | Design Approvals for Radioactive Materials Packages | HM-73 | FR | 38 FR 4396 |
| 2/13/1973 | Matter Incorporated by Reference | HM-22 | FR | 38 FR 4331 |
| 1/15/1973 | Phosphorous Pentasulfide | HM-80 | FR | 38 FR 1507 |