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Rulemaking Documents

The following DOT Rules are linked to the Federal Register website. The Federal Register is the Federal Government’s official daily publication of rules, proposed rules, and notices of federal agencies, and provides a forum for public participation in the democratic process.

To learn more about DOT Rules, choose a document type, topic, or conduct a title search by keyword. Results will include a summary of the Rule and a link to the PDF of the appropriate Federal Register page. The Federal Register provides rulesmaking documents dating back to 1995.

If you need to see rules prior to 1995, please contact:

Office of Hazardous Materials Safety: 202-366-4488

Office of Pipeline Safety: 202-366-4595
Date Subject Part
04/01/2008 Hazardous Materials: Improving the Safety of Railroad Tank Car Transportation of Hazardous Materials 171 173 174 179
03/28/2008 Pipeline Safety: Administrative Procedures, Address Updates, and Technical Amendments 190 191 192 193 194 195 199
03/12/2008 Pipeline Safety: Standards for Increasing the Maximum Allowable Operating Pressure for Gas Transmission Pipelines 192
01/28/2008 Hazardous Materials; Miscellaneous Amendments 171 172 173 175 177 178 180
01/08/2008 Pipeline Safety: Polyamide-11 (PA-11) Plastic Pipe Design Pressures 192
01/07/2008 Hazardous Materials: Revisions to the List of Hazardous Substances and Reportable Quantities 172
12/13/2007 Pipeline Safety: Applicability of Public Awareness Regulations to Certain Gas Distribution Operators 192
10/01/2007 Hazardous Materials Regulations: Minor Editorial Corrections and Clarifications 105 106 107 110 130 171 172 173 174 175 176 178 179 180
09/28/2007 Hazardous Materials Regulations: Transportation of Compressed Oxygen, Other Oxidizing Gases and Chemical Oxygen Generators on Aircraft 173 175 178
09/28/2007 Hazardous Materials: Revision and Reformatting of Requirements for the Authorization To Use International Transport Standards and Regulations; Correction 171
09/20/2007 Hazardous Materials: Fuel Cell Cartridges and Systems Transported on Board Passenger Aircraft in Carry-on Baggage 171 173 175
08/10/2007 Pipeline Safety: Hazardous Liquid Pipelines Transporting Ethanol, Ethanol Blends, and other Biofuels 195
08/09/2007 Hazardous Materials; Transportation of Lithium Batteries 171 172 173 175
07/17/2007 Pipeline Safety: Integrity Management Program Modifications and Clarifications 192 195
07/02/2007 Hazardous Materials: Revision of Requirements for Emergency Response Telephone Numbers 172
06/27/2007 Security Requirements for Motor Carriers Transporting Hazardous Materials 177
05/18/2007 Pipeline Safety: Protecting Unusually Sensitive Areas From Rural Low-Stress Hazardous Liquid Pipelines 195
05/03/2007 Hazardous Materials: Revision and Reformatting of Requirements for the Authorization To Use International Transport Standards and Regulations 171 172 173 175 176
05/03/2007 Hazardous Materials Transportation; Miscellaneous Revisions to Registration and Fee Assessment Program 107
04/23/2007 Pipeline Safety: Design and Construction Standards To Reduce Internal Corrosion in Gas Transmission Pipelines 192
04/12/2007 Hazardous Materials: Miscellaneous Cargo Tank Motor Vehicle and Cylinder Issues; Petitions for Rulemaking 107 171 172 173 176 178 180
02/01/2007 Pipeline Safety: Update of Regulatory References to Technical Standards 192 195
01/31/2007 Hazardous Materials Regulations: Transportation of Compressed Oxygen, Other Oxidizing Gases and Chemical Oxygen Generators on Aircraft 171 172 173 175 178
01/10/2007 Hazardous Materials: Enhancing Rail Transportation Safety and Security for Hazardous Materials Shipments 172 174
12/29/2006 Hazardous Materials: Harmonization With the United Nations Recommendations, International Maritime Dangerous Goods Code, and International Civil Aviation Oganization's Technical Instructions 171 172 173 175 176 178 180
12/21/2006 Hazardous Materials: Enhancing Rail Transportation Safety and Security for Hazardous Materials Shipments 172 174
12/18/2006 Shippers-General Requirements for Shipments and Packagings 173
12/01/2006 Hazardous Materials: Miscellaneous Packaging Amendments; Correction 171 172 173 174 178
10/31/2006 Rulemaking Procedures 106
09/29/2006 Pipeline Safety: Applicability of Public Awareness Regulations to Certain Gas Distribution Operators 192
09/28/2006 Hazardous Materials: Prohibition on the Transportation of Primary Lithium Batteries and Cells Aboard Passenger Aircraft 172
09/25/2006 Hazardous Materials; Miscellaneous Amendments 171 172 173 175 177 178 180
09/21/2006 Hazardous Material: Revision of Requirements for Security Plans 172
09/20/2006 Hazardous Materials Regulations: Minor Editorial Corrections and Clarifications; Correction 107 171 172 173 175 177 178 180
09/14/2006 Hazardous Materials Regulations: Minor Editorial Corrections and Clarifications 107 171 172 173 175 177 178 180
09/06/2006 Pipeline Safety: Protecting Unusually Sensitive Areas From Rural Onshore Hazardous Liquid Gathering Lines and Low-Stress Lines 195
09/01/2006 Hazardous Material; Miscellaneous Packaging Amendments 171 172 173 174 178
08/31/2006 Hazardous Materials: Harmonization With the United Nations Recommendations, International Maritime Dangerous Goods Code, and International Civil Aviation Organization's Technical Instructions 171 172 173 175 176 178 180
08/29/2006 Hazardous Materials: Aluminum Cylinders Manufactured of Aluminum Alloy 6351-T6 Used in SCUBA, SCBA, and Oxygen Services-Revised Requalification and Use Criteria 173 180
08/15/2006 Hazardous Materials Transportation; Registration and Fee Assessment Program 107
08/08/2006 Hazardous Materials: Incorporation of Statutorily Mandated Revisions to the Hazardous Materials Regulations; Correction 171
08/08/2006 Regulatory Flexibility Act Section 610 and Plain Language Reviews 110 178
06/12/2006 Hazardous Materials: Requirements for UN Cylinders 107 171 172 173 178 180
06/09/2006 Pipeline Safety: Update of Regulatory References to Technical Standards 192 193 195
06/07/2006 Hazardous Materials: Safety Requirements for External Product Piping on Cargo Tanks Transporting Flammable Liquids 173
06/02/2006 Hazardous Materials: Infectious Substances; Harmonization With the United Nations Recommendations 171 172 173 175
05/25/2006 Hazardous Materials: Preemption Determinations; Procedural Regulations 107
04/25/2006 Hazardous Materials: Requirements for Lighters and Lighter Refills 171 172 173
03/22/2006 Hazardous Materials: Revision of Requirements for Carriage by Aircraft 171 172 173 175
03/15/2006 Gas Gathering Line Definition; Alternative Definition for Onshore Lines and New Safety Standards 192