| 12/16/1969 | Extension of Retest Interval for Nonpressure Tank Cars | HM-39 | NPRM | 34 FR 19722 |
| 12/11/1969 | Interlocking Couplers and Restriction of Capacity of Tank Cars | HM-38 | NPRM | 34 FR 19553 |
| 12/10/1969 | Aniline Oil | HM-37 | NPRM | 34 FR 19511 |
| 11/21/1969 | Benzoyl Peroxide, Wet | HM-18 | FR | 34 FR 18552 |
| 11/21/1969 | Special Composite Package for Electrolyte (Acid) or Alkaline Corrosive Battery Fluid | HM-25 | FR | 34 FR 18554 |
| 11/21/1969 | Miscellaneous Restrictions Against Loading and Transporting Poisons (Class A or B) with Foodstuffs | HM-4 | FR | 34 FR 18553 |
| 11/14/1969 | Matter Incorporated by Reference; Requirements for Shipping Refrigerating Machines | HM-22 | FR | 34 FR 18246 |
| 11/5/1969 | Transportation of Liquids by Pipeline | HM-6 | FR | 34 FR 17916 |
| 10/30/1969 | Packaging of Certain Radioactive Materials | HM-2 | FR | 34 FR 17522 |
| 10/30/1969 | Specification 50X Portable Tanks and 4B240X Cylinders | HM-26 | FR | 34 FR 17523 |
| 10/29/1969 | Reports of Hazardous Materials Incidents | HM-36 | NPRM | 34 FR 17450 |
| 10/9/1969 | Flammable Liquids in MC330 and MC 331 Cargo Tanks; Emergency Discharge Controls for Cargo Tanks | HM-35 | NPRM | 34 FR 15660 |
| 10/4/1969 | Transportation of Liquids by Pipeline | HM-6 | NPRM | 34 FR 15489 |
| 10/4/1969 | Requirements for Design, Construction, Operation, and Maintenance | HM-6 | FR | 34 FR 15473 |
| 8/29/1969 | Hydrofluoric Acid | HM-20 | FR | 34 FR 13871 |
| 8/29/1969 | Electric Storage Batteries; Exemption | HM-21 | FR | 34 FR 13872 |
| 8/29/1969 | Explosives on Vehicles in Combination | HM-24 | FR | 34 FR |
| 8/20/1969 | Extension of Specification 3HT Cylinder Service Life | HM-31 | NPRM | 34 FR 13428 |
| 8/20/1969 | Specification 1K Carboy for Certain Chlorides | HM-30 | NPRM | 34 FR 13426 |
| 8/20/1969 | Change in Shipping Name and Removal of Authorization to Ship or Transport Dimethylhexane Dihydroperoxide, Dry | HM-32 | NPRM | 34 FR 13426 |
| 8/20/1969 | Cyanides or Cyanide Mixtures | HM-33 | NPRM | 34 FR 13427 |
| 8/20/1969 | Liquefied Petroleum Gas in Cargo Tanks Constructed of Quenched and Tempered Steel | HM-34 | NPRM | 34 FR 13427 |
| 8/19/1969 | New Specification 8BW Cylinder for Acetylene | HM-23 | NPRM | 34 FR 13374 |
| 8/1/1969 | Miscellaneous Amendments to Chapter | HM-9 | FR | 34 FR 12588 |
| 7/25/1969 | Carbon Monoxide in Manifolded Cylinders; Authorization of Shipments and Increased Filling Limitations | HM-29 | NPRM | 34 FR 12291 |
| 7/25/1969 | Miscellaneous Amendments to Chapter; Correction | HM-3 | FR | 34 FR 12282 |
| 7/23/1969 | Reuse of Spec. 17 Series Steel Drums | HM-27 | NPRM | 34 FR 12187 |
| 7/23/1969 | Removal of Label Exemption | HM-28 | NPRM | 34 FR 12188 |
| 7/16/1969 | Specification 50X Portable Tanks and 4B240X Cylinders | HM-26 | NPRM | 34 FR 11978 |
| 7/16/1969 | Hazardous Materials in Specification 106a and 110a Tanks by Rail Freight and Highway | HM-14 | NPRM | 34 FR 11977 |
| 6/26/1969 | Aerosol Flash Point Restriction | HM-15 | FR | 34 FR 9869 |
| 6/26/1969 | Shipment of Benzene Phosphorus Dichloride and Benzene Phosphorus Thiochloride | HM-16 | FR | 34 FR 9868 |
| 6/26/1969 | Shipment of Residual Motor Fuel Antiknock Compound | HM-17 | FR | 34 FR 9869 |
| 6/26/1969 | Methyl Chloride in Specification 110A500W Tank Car Tanks | HM-19 | FR | 34 FR 9869 |
| 5/29/1969 | New Specification 8BW Cylinder for Acetylene | HM-23 | NPRM | 34 FR 8300 |
| 5/28/1969 | Packaging of Radioactive Materials | HM-2 | FR | 34 FR 8244 |
| 5/28/1969 | Shipping Container Specifications; Fiberboard Boxes | HM-25 | NPRM | 34 FR 8245 |
| 5/24/1969 | Welded Aluminum Cylinders | HM-13 | FR | 34 FR 8166 |
| 5/9/1969 | Transportation of Pesticides | HM-4 | ANPRM | 34 FR 7545 |
| 5/8/1969 | Loading and Transporting Poisons, Class A or B with Foodstuffs | HM-4 | NPRM | 34 FR 7456 |
| 5/8/1969 | Explosives on Vehicles in Combination | HM-24 | NPRM | 34 FR 7457 |
| 5/6/1969 | Miscellaneous Amendments | HM-3 | FR | 34 FR 7332 |
| 5/1/1969 | Miscellaneous Amendments to Chapter | HM-3 | FR | 34 FR 7158 |
| 4/23/1969 | Matter Incorporated by Reference | HM-22 | NPRM | 34 FR 6795 |
| 4/23/1969 | Transport of Highly Volatile Liquids by Pipeline | HM-6A | ANPRM | 34 FR 6798 |
| 4/23/1969 | New Specification 8BW Cylinder for Acetylene | HM-23 | NPRM | 34 FR 6797 |
| 4/12/1969 | Shipment of Anhydrous Hydrazine | HM-12 | FR | 34 FR 6437 |
| 4/12/1969 | Hydrofluoric Acid | HM-20 | NPRM | 34 FR 6444 |
| 4/12/1969 | Electric Storage Batteries | HM-21 | NPRM | 34 FR 6444 |
| 4/9/1969 | Transportation of Metyhl Chloride; Use of Certain Multiunit Tank Car Tanks | HM-19 | NPRM | 34 FR 6290 |
| 3/12/1969 | Transportation of Hazardous Materials | HM-17 | NPRM | 34 FR 5113 |
| 3/12/1969 | Transportation of Hazardous Materials | HM-18 | NPRM | 34 FR 5113 |
| 3/12/1969 | Transportation of Hazardous Materials | HM-15 | NPRM | 34 FR 5112 |
| 3/12/1969 | Transportation of Hazardous Materials | HM-16 | NPRM | 34 FR 5112 |
| 2/15/1969 | Shipping Container Specifications | HM-13 | NPRM | 34 FR 2257 |
| 2/15/1969 | Transportation of Tanks Containing Antimony Pentachloride | HM-14 | ANPRM | 34 FR 2256 |
| 1/16/1969 | Rocketdyne, North American Rockewell Corp.; Petition for Special Permit | HM-12 | NPRM | 34 FR 645 |
| 12/27/1968 | Radioactive Materials and Other Miscellaneous Amendments; Correction | HM-2 | FR | 33 FR 19822 |
| 12/3/1968 | Change of Reference | HM-11 | FR | 33 FR 17918 |
| 11/21/1968 | Tank Car Specifications | HM-10 | NPRM | 33 FR 17246 |
| 11/20/1968 | Transportation of Hazardous Materials | HM-9 | NPRM | 33 FR 17189 |
| 10/25/1968 | Transport of Hazardous Materials by Pipeline | HM-6 | NPRM | 33 FR 15807 |
| 10/16/1968 | Transportation of Hazardous Materials | HM-8 | ANPRM | 33 FR 15347 |
| 10/4/1968 | Radioactive Materials and Other Miscellaneous Amendments | HM-2 | FR | 33 FR 14918 |
| 8/21/1968 | Transportation of Hazardous Materials | HM-7 | NPRM | 33 FR 11862 |
| 8/6/1968 | Explosive and Other Dangerous Articles | HM-3 | NPRM | 33 FR 11121 |
| 7/17/1968 | Transportation of Hazardous Materials by Pipeline | HM-6 | NPRM | 33 FR 10213 |
| 6/4/1968 | Rulemaking Procedures of the Hazardous Materials Regulations Board | HM-1 | FR | 33 FR 8277 |
| 5/21/1968 | Hazardous Materials Regulations Board; Stress Corrosion in MC 330 & 331 Cargo Tanks | HM-5 | FR | 33 FR 7493 |
| 3/8/1968 | Explosives and Other Dangerous Articles | HM-3 | NPRM | 33 FR 4340 |
| 2/28/1968 | Rules of Procedure; Filing and Processing of Petitions for Special Permits | HM-1 | NPRM | 33 FR 3439 |
| 2/27/1968 | Explosives and Other Dangerous Articles | HM-3 | NPRM | 33 FR 3382 |
| 1/31/1968 | Stress Corrosion in MC 330 and MC 331 Cargo Tanks | HM-5 | FR | 33 FR 2389 |
| 1/20/1968 | Radioactive Materials | HM-2 | NPRM | 33 FR 750 |
| 12/29/1967 | Miscellaneous Restrictions Against Loading and Transporting Class B Poisonous Liquids or Solids with Foodstuffs | HM-4 | FR | 32 FR 20982 |
| 11/30/1967 | Rules of Procedure | HM-1 | NPRM | 32 FR 16437 |
