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Chief Counsel Interpretations

The Pipeline and Hazardous Materials Safety Administration, Office of the Chief Counsel, also provides informal and formal written interpretations of the Hazardous Materials Regulations (HMR; 49 CFR Parts 100-185).  Formal interpretations are in the form of Federal Register publications and are listed below.  Informal interpretations, also listed below, are included in the Hazardous Materials Interpretations searchable database and can be identified by "CHI" in the PHMSA ID field.  Examples of the application of the HMR can also be found in Appeal Decisions.

Formal Interpretations Issued by the Office of the Chief Counsel
There are no current interpretations.
Informal Interpretations Issued by the Office of the Chief Counsel
PHMSA ID Date Company (or Individual) Regulation References
CHI-05-001 Mar 8, 2005 Gebauer Company 173.21
CHI-04-005 Jun 14, 2004 USAF 107.606
CHI-04-004 May 26, 2004 Science Applications International Corporation 107.606
CHI-04-003 May 18, 2004 Rhode Island Trucking Association, Inc. 177.8
CHI-04-002 Mar 8, 2004 Agricultural Retailers Association 172.802
CHI-04-001 Feb 19, 2004 Agricultural Retailers Association 172.802
CHI-01-002 May 29, 2001 International Warehouse Logistics Association 107.1
CHI-97-005 Dec 12, 1997 U.S. Department of Energy 49 USC 5101
CHI-97-003 Aug 19, 1997 Lockheed Martin Energy Systems, Inc. 49 USC 5101
CHI-97-002 Jun 13, 1997 City of Fort Worth, TX 171.1, 177.823, 171.8
CHI-96-002 Jun 27, 1996 City of Fairbanks, AK 174.14
CHI-96-001 Mar 7, 1996 Digital Audio Disc Corporation 174.14, 105.5
CHI-94-005 Sep 26, 1994 California Environmental Projection Agency 49 USC 5102
CHI-94-004 Jun 2, 1994 Nebraska Public Power District 49 USC 5102
CHI-94-003 Apr 19, 1994 California Department of Justice 49 USC 5102
CHI-94-002 Apr 18, 1994 Bechtel Petroleum Operations, Inc. 171.1
CHI-94-001 Feb 23, 1994 Swidler & Berlin 171.2
CHI-91-002 Dec 5, 1991 U.S. Department of Energy 107.1
CHI-91-001 Apr 23, 1991 U.S. Department of Energy 107.1
CHI-89-001 Apr 14, 1989 National Tank Truck Carriers, Inc. 172.3, 173.22, 171.2, 171.3
CHI-98-001 May 16, 1988 National Tank Truck Carriers, Inc. 171.2, 171.3, 172.3, 173.22
CHI-87-003 Mar 2, 1987 Lawrence W. Bierlein, P.C. 173.301
CHI-87-001 Feb 2, 1987 Illinois Department of Transportation 172.504, 172.505
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