| 12/28/1978 | Blasting Agents | HM-143 | FR | 43 FR 60472 | 
| 12/18/1978 | Location of Manholes & Certification Plate - Cargo Tanks | HM-136 | FR | 43 FR 58818 | 
| 12/18/1978 | Conversion of Exemptions | HM-139A | NPRM | 43 FR 58834 | 
| 12/11/1978 | Conversion of Exemptions | HM-139 | FR | 43 FR 57891 | 
| 12/11/1978 | Blasting Agents | HM-143 | FR | 43 FR 57898 | 
| 12/11/1978 | IM Portable Tanks | HM-167 | NPRM | 43 FR 58050 | 
| 12/11/1978 | HM on Aircraft | HM-168 | NPRM | 43 FR 57928 | 
| 12/4/1978 | Transportation of Asbestos | HM-HM-160 | FR | 43 FR 56664 | 
| 11/30/1978 | Metric Equivalence for Quantity Limitations | HM-HM-162 | FR | 43 FR 56043 | 
| 11/30/1978 | Shipment of Hazardous Materials by Water | HM-HM-166 | NPRM | 43 FR 56070 | 
| 11/2/1978 | Miscellaneous Amendments to Chapter | HM-56 | FR | 43 FR 51020 | 
| 10/26/1978 | Highway Routing of Radioactive Materials; Public Hearing | HM-HM-164 | ANPRM | 43 FR 50006 | 
| 10/19/1978 | Miscellaneous Amendments to Chapter | HM-56 | FR | 43 FR 48641 | 
| 10/5/1978 | Color Coding - Compressed Gas Packagings | HM-141 | NPRM | 43 FR 46050 | 
| 10/2/1978 | Predesignation & Revision - RSPA | HM-165 | FR | 43 FR 45366 | 
| 9/25/1978 | Predesignation & Revision - RSPA | HM-165 | FR | 43 FR 43305 | 
| 9/18/1978 | Repair and Maintenance of Vehicles; Highway | HM-110 | FR | 43 FR 41401 | 
| 9/7/1978 | Conversion of Exemptions | HM-139 | FR | 43 FR 39788 | 
| 9/7/1978 | Conversion of Exemptions | HM-139 | NPRM | 43 FR 39835 | 
| 9/7/1978 | Specifications for Pressure Tank Car Tanks | HM-144 | FR | 43 FR 39792 | 
| 8/17/1978 | Withdrawal of BOE | HM-163 | FR | 43 FR 36445 | 
| 8/17/1978 | Highway Routing of Radioactive Materials; Inquiry | HM-HM-164 | ANPRM | 43 FR 36492 | 
| 8/10/1978 | I-Bars on Steel Drums | HM-121 | FR | 43 FR 35485 | 
| 7/20/1978 | I-Bars on Steel Drums | HM-121 | FR | 43 FR 31138 | 
| 7/13/1978 | Specifications for Pressure Tank Car Tanks | HM-144 | FR | 43 FR 30057 | 
| 7/10/1978 | Polyethylene Drum | HM-119 | FR | 43 FR 29562 | 
| 6/29/1978 | Metric Equivalence for Quantity Limitations | HM-HM-162 | NPRM | 43 FR 28216 | 
| 6/8/1978 | Specifications for Pressure Tank Car Tanks | HM-144 | NPRM | 43 FR 24865 | 
| 6/8/1978 | Matter Incorporated by Reference | HM-22 | FR | 43 FR 24844 | 
| 6/8/1978 | Placarding Extension for Nurse Tanks | HM-HM-103; HM-112 | FR | 43 FR 24845 | 
| 6/5/1978 | Conversion of Exemptions | HM-139 | NPRM | 43 FR 24335 | 
| 5/25/1978 | Transportation of Hazardous Waste Materials | HM-HM-145A | NPRM | 43 FR 22626 | 
| 5/18/1978 | Conversion of Exemptions | HM-139 | FR | 43 FR 21462 | 
| 5/18/1978 | Specification 3AX, 3AAX, & 3T Cylinders | HM-99 | FR | 43 FR 21461 | 
| 5/11/1978 | Specifications for Pressure Tank Car Tanks | HM-144 | NPRM | 43 FR 20250 | 
| 5/4/1978 | Detonators & Detonating Primers | HM-161 | NPRM | 43 FR 19242 | 
| 4/27/1978 | Conversion of Exemptions | HM-139 | FR | 43 FR 17942 | 
| 3/30/1978 | Specification 3AX, 3AAX, & 3T Cylinders | HM-99 | FR | 43 FR 13382 | 
| 3/16/1978 | Quantity Limits RAM | HM-150 | FR | 43 FR 10917 | 
| 3/6/1978 | Conversion of Exemptions | HM-139 | FR | 43 FR | 
| 3/2/1978 | Conversion of Exemptions | HM-139 | FR | 43 FR 8519 | 
| 3/2/1978 | Transportation of Asbestos | HM-HM-160 | NPRM | 43 FR 8562 | 
| 2/23/1978 | Interlocking Couplers and Restriction of Capacity of Tank Cars | HM-38 | FR | 37 FR 7436 | 
| 2/23/1978 | Hazardous Materials Table and Hazardous Materials Communications Regulations; Forbidden Materials | HM-HM-159 | ANPRM | 43 FR 7449 | 
| 2/16/1978 | Empty Canadian Tank Cars | HM-158 | FR | 43 FR 6786 | 
| 2/6/1978 | Incorporation of the Federal Motor Carrier Safety Regulations by Reference | HM-HM-157 | FR | 43 FR 4858 | 
| 1/26/1978 | Prohibit Construction of 112A/114A Tank Cars | HM-125 | NPRM | 43 FR 3598 | 
| 1/19/1978 | Flatting Test for Seamless Cylinders | HM-156 | NPRM | 43 FR 2741 | 
| 1/16/1978 | Specifications for Pressure Tank Car Tanks | HM-144 | FR | 43 FR 2180 | 
| 1/9/1978 | Matter Incorporated by Reference | HM-22 | NPRM | 43 FR 1369 | 
| 12/27/1977 | Extend Service Life - 3HT Cylinders | HM-146 | FR | 42 FR 64628 | 
| 12/19/1977 | Extend Service Life - 3HT Cylinders | HM-146 | FR | 42 FR 63644 | 
| 12/5/1977 | DOT 17H-Modifications | HM-140 | FR | 42 FR 61464 | 
| 12/5/1977 | Interlocking Couplers and Restriction of Capacity of Tank Cars | HM-38 | FR | 42 FR 61465 | 
| 11/14/1977 | Conversion of Exemptions | HM-139 | FR | 42 FR 58937 | 
| 11/10/1977 | Extension of Placarding Compliance Date | HM-HM-103; HM-112 | FR | 42 FR 58522 | 
| 11/10/1977 | Hydrogen Peroxide Water Solutions Transported by Vessel | HM-HM-112 | FR | 42 FR 58524 | 
| 11/7/1977 | Conversion of Exemptions | HM-139 | FR | 42 FR 57964 | 
| 9/29/1977 | Development of Regulations for the Transportation of Hazardous Waste | HM-HM-145 | SANPRM | 42 FR 51625 | 
| 9/17/1977 | Specifications for Pressure Tank Car Tanks | HM-144 | FR | 42 FR 46306 | 
| 9/15/1977 | Requirement RAM on Aircraft | HM-152 | NPRM | 42 FR 46373 | 
| 9/12/1977 | Drum Specification Consolidation | HM-155 | ANPRM | 42 FR 45696 | 
| 9/12/1977 | Consolidation of Bag Specifications | HM-HM-153 | ANPRM | 42 FR 45695 | 
| 9/12/1977 | Consolidation of Box Specifications | HM-HM-154 | ANPRM | 42 FR 45695 | 
| 9/1/1977 | Conversion of Exemptions | HM-139 | NPRM | 42 FR 43993 | 
| 9/1/1977 | Conversion of Exemptions | HM-139 | NPRM | 42 FR 43994 | 
| 9/1/1977 | Conversion of Exemptions | HM-139 | NPRM | 42 FR 43995 | 
| 8/29/1977 | Blasting Agents | HM-143 | NPRM | 42 FR 43416 | 
| 8/22/1977 | Conversion of Exemptions | HM-139 | FR | 42 FR 42206 | 
| 8/8/1977 | Conversion of Exemptions | HM-139 | NPRM | 42 FR 40003 | 
| 7/21/1977 | Requirement RAM on Aircraft | HM-152 | NPRM | 42 FR 37427 | 
| 7/21/1977 | Proposed Inspection and Monitoring Requirements for Radioactive Materials--Withdrawal of Notice | HM-HM-131 | NPRM | 42 FR 37426 | 
| 7/5/1977 | Label & Placard Colors | HM-151 | FR | 42 FR 34283 | 
| 6/23/1977 | Conversion of Exemptions | HM-139 | NPRM | 42 FR 31815 | 
| 6/23/1977 | Conversion of Exemptions | HM-139 | NPRM | 42 FR 31817 | 
| 6/6/1977 | Consolidation of Hazardous Materials Regulations | HM-HM-103; HM-112 | FR | 42 FR 28888 | 
| 6/6/1977 | New Hazardous Materials Placards; Date On Which Use Becomes Mandatory | HM-HM-103; HM-112 | FR | 42 FR 28951 | 
| 6/2/1977 | Conversion of Exemptions | HM-139 | FR | 42 FR 28132 | 
| 5/26/1977 | Quantity Limits RAM | HM-150 | NPRM | 42 FR 27002 | 
| 5/3/1977 | Air Transportation of Limited Quantities of Low-Level Radioactive Materials; Exemption Renewal | HM-HM-149 | FR | 42 FR 22366 | 
| 4/7/1977 | Conversion of Exemptions | HM-139 | NPRM | 42 FR 18409 | 
| 4/7/1977 | Conversion of Exemptions (clearer) | HM-139 | NPRM | 42 FR 18410 | 
| 4/7/1977 | Conversion of Exemptions (clearer) | HM-139 | NPRM | 42 FR 18411 | 
| 3/28/1977 | Air Transportation of Small Quantities of Materials Exhibiting Very Low Levels of Radiation | HM-HM-149 | NPRM | 42 FR 16459 | 
| 3/10/1977 | Environmental and Health Effects Materials | HM-HM-145 | ANPRM | 42 FR 13309 | 
| 2/28/1977 | Conversion of Exemptions | HM-139 | FR | 42 FR 11238 | 
| 2/7/1977 | Gallium Metal | HM-137 | FR | 42 FR 7140 | 
| 2/7/1977 | Correct ORMs | HM-148 | FR | 42 FR 7139 | 
| 1/27/1977 | Carbon Dioxide on Aircraft | HM-147 | FR | 42 FR 5059 | 
| 1/13/1977 | HM Reissuance | HM-134 | FR | 42 FR 2688 | 
| 1/13/1977 | Specifications for Pressure Tank Car Tanks | HM-144 | NPRM | 42 FR 2709 | 
| 12/30/1976 | Hazard Information System | HM-103; 112 | FR | 41 FR 57018 | 
| 12/23/1976 | Conversion of Exemptions | HM-139 | FR | 41 FR 55876 | 
| 12/16/1976 | Extend Service Life - 3HT Cylinders | HM-146 | NPRM | 41 FR 54958 | 
| 12/16/1976 | Approval of Bulk Tanks for Transportation by Air | HM-HM-128 | FR | 41 FR 54942 | 
| 12/9/1976 | Environmental and Health Effects Materials | HM-HM-145 | ANPRM | 41 FR 53824 | 
| 11/29/1976 | Specifications for Pressure Tank Car Tanks | HM-144 | NPRM | 41 FR 52324 | 
| 11/29/1976 | Matter Incorporated by Reference | HM-22 | FR | 41 FR 52300 | 
| 11/26/1976 | Blasting Agents | HM-143 | NPRM | 41 FR 52083 | 
| 11/15/1976 | Conversion of Exemptions | HM-139 | FR | 41 FR 50262 | 
| 11/4/1976 | Conversion of Exemptions | HM-139 | NPRM | 41 FR 48553 | 
| 10/12/1976 | Repair and Maintenance of Vehicles; Highway | HM-110 | NPRM | 41 FR 44712 | 
| 10/12/1976 | Matter Incorporated by Reference | HM-22 | NPRM | 41 FR 44711 | 
| 9/30/1976 | Conversion of Individual Exemptions to Regulations of General Applicability | HM-HM-139 | NPRM | 41 FR 43188 | 
| 9/30/1976 | Conversion of Individual Exemptions to Regulations of General Applicability | HM-HM-139 | NPRM | 41 FR 43189 | 
| 9/30/1976 | Conversion of Individual Exemptions to Regulations of General Applicability | HM-HM-139 | NPRM | 41 FR 43190 | 
| 9/30/1976 | Conversion of Individual Exemptions to Regulations of General Applicability | HM-HM-139 | NPRM | 41 FR 43191 | 
| 9/30/1976 | Color Coding of Compressed Gas Packages | HM-HM-141 | ANPRM | 41 FR 43188 | 
| 9/24/1976 | HM Reissuance | HM-134 | FR | 41 FR 40475 | 
| 9/23/1976 | DOT 17H-Modifications | HM-140 | NPRM | 41 FR 41713 | 
| 9/20/1976 | Hazard Information System | HM-103; 112 | FR | 41 FR 40614 | 
| 9/13/1976 | Conversion of Exemptions | HM-139 | NPRM | 41 FR 38779 | 
| 9/9/1976 | HM Reissuance | HM-134 | FR | 41 FR 38167 | 
| 9/9/1976 | HM Reissuance | HM-134 | FR | 41 FR 38175 | 
| 9/9/1976 | Preemption and Enforcement Procedures | HM-HM-138 | FR | 41 FR 38167 | 
| 9/2/1976 | Gallium Metal | HM-137 | FR | 41 FR 37114 | 
| 7/8/1976 | Repair and Maintenance of Vehicles; Highway | HM-110 | FR | 41 FR 27968 | 
| 7/6/1976 | Classification of New Explosives and Shipment of Samples of Explosives; Editorial Changes | HM-HM-116 | FR | 41 FR 27728 | 
| 6/24/1976 | Consolidation of Hazardous Materials Regulations | HM-HM-103; HM-112 | FR | 41 FR 26014 | 
| 5/26/1976 | Tank Car Tank Head Shields | HM-109 | FR | 41 FR 21475 | 
| 5/6/1976 | Matter Incorporated by Reference | HM-22 | FR | 41 FR 18656 | 
| 5/4/1976 | Inspection and Testing Requirements for Cylinders Manufactured Outside United States | HM-HM-74 | FR | 41 FR 18412 | 
| 4/30/1976 | Location of Manholes & Certification Plate - Cargo Tanks | HM-136 | NPRM | 41 FR 18093 | 
| 4/28/1976 | Certification of Cargo Tanks and Placarding of Motor Vehicles | HM-135 | FR | 41 FR 17735 | 
| 4/21/1976 | Switching of Freight Cars | HM-120 | NPRM | 41 FR 16661 | 
| 4/20/1976 | Tank Car Tank Head Shields | HM-109 | NPRM | 41 FR 16571 | 
| 4/15/1976 | Carbon Dioxide on Aircraft | HM-147 | NPRM | 41 FR 15972 | 
| 4/15/1976 | Consolidation of Hazardous Materials Regulations | HM-HM-103; HM-112 | FR | 41 FR 15972 | 
| 4/15/1976 | Consolidation of Hazardous Materials Regulations | HM-HM-112 | FR | 41 FR 15972 | 
| 4/9/1976 | Classification of New Explosives and Shipment of Samples of Explosives | HM-HM-116 | FR | 41 FR 15013 | 
| 3/17/1976 | Cylinders Manufactured Outside United States | HM-HM-74; HM-74A | NPRM | 41 FR 11179 | 
| 3/12/1976 | Matter Incorporated by Reference | HM-22 | NPRM | 41 FR 10627 | 
| 3/3/1976 | HM Reissuance | HM-134 | NPRM | 41 FR 9188 | 
| 2/23/1976 | Definition of Flammable & Combustible Liquids | HM-133 | FR | 41 FR 7947 | 
| 2/19/1976 | Domestic Agents for Non-Residents of the United States | HM-HM-127 | FR | 41 FR 7509 | 
| 2/5/1976 | Hazard Information Systems | HM-HM-126 | ANPRM | 41 FR 5347 | 
| 1/27/1976 | Ethylene Oxide; Opening in Tank Car Heads | HM-HM-100 | FR | 41 FR 3869 | 
| 1/27/1976 | Bottom Outlets Valves on MC 312 Cargo Tanks | HM-HM-124 | FR | 41 FR 3869 | 
| 1/23/1976 | Use of Hazardous Materials Packagings Authorized Under Exemptions | HM-HM-127 | FR | 41 FR 3477 | 
| 1/13/1976 | Cylinders Manufactured Outside United States | HM-HM-74 | NPRM | 41 FR 1919 |