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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.

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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-15-0167 Sep 2, 2015 Bruce D. Green 171.1, 171.8, 175.1
CHI-14-002 Oct 16, 2014 Bullfrog Fire & Safety 107.202, 107.203, 107.205, 107.709, 107.805, 107.713, 180.205
CHI-14-0036 Feb 26, 2014 Washington State Department of Ecology 171.1
CHI-14-001 Feb 26, 2014 Reusable Industrial Packaging Association 180.350, 180.352
CHI-13-003 Aug 29, 2013 T-MAK Labs, Inc. 107
CHI-13-001 Aug 16, 2013 Lawrence W. Bierlein 178.813, 180.352
CHI-12-0175 Jan 25, 2013 International Union UAW 171.15, 171.8
CHI-11-003 Dec 20, 2011 NASA 171.1
CHI-10-0239 Jun 16, 2011 Village of Itasca 171.1
CHI-11-005 May 25, 2011 County of San Diego U.S.C. 5125
CHI-11-002 May 25, 2011 County of San Diego U.S.C. 5125, 177.800
CHI-11-001 May 10, 2011 Missouri Trucking Association 107.201, 172.701
CHI-11-004 May 10, 2011 Missouri Trucking Association 172.201
CHI-10-005 Oct 6, 2010 Meeks, Sheppard, Leo & Pillsbury 171.8
CHI-10-004 Aug 23, 2010 ACCU CHEM Conversion, Inc. U.S.C. 5101, U.S.C. 5125, 171.1, 171.8
CHI-10-0114 Aug 4, 2010 FMCSA Office of Enforcement and Compliance U.S.C. 5103, U.S.C. 5121, U.S.C. 5125, 171.2
CHI-09-0089 Apr 2, 2010 Bob Craig U.S.C. 5102, 171.1
CHI-10-006 Apr 1, 2010 Potomac Strategy Associates 57 Fed. Reg. 45453, 71 Fed. Reg. 52019, 75 Fed. Reg. 5337
CHI-10-003 Mar 30, 2010 B.J. Alan Company 173.56, U.S.C. 5125, 107.23
CHI-10-002 Mar 12, 2010 Wal-Mart Stores, Inc. 177.802
CHI-10-001 Jan 20, 2010 Potomac Strategy Associates 171.8, 178.801
CHI-09-001 Nov 4, 2009 Wal-Mart Stores, Inc. 171.9, 173.159
CHI-06-0085 Sep 11, 2007 The UPS Store 171.2
CHI-07-001 Sep 7, 2007 Hoagland, Fitzgerald, Smith & Pranaitis U.S.C. 5125, 106.95 -106.105, Part 180
CHI-07-002 May 9, 2007 Minnesota Department of Transportation 49 U.S.C. 5101, 49 U.S.C. 5125, 107, 171.1, 397
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-04-009 May 25, 2004 State of Ohio EPA 49 U.S.C. 5101, 49 U.S.C. 5125, 350, 350.201, 390-397
CHI-04-003 May 18, 2004 Rhode Island Trucking Association, Inc. 177.8
CHI-04-008 Mar 12, 2004 State of Ohio EPA 49 U.S.C. 5101, 67 Fed. Reg. 54967, 67 Fed. Reg. 53118, 67 Fed. Reg. 57637
CHI-04-002 Mar 8, 2004 Agricultural Retailers Association 172.802
CHI-04-001 Feb 19, 2004 Agricultural Retailers Association 172.802
CHI-04-007 Feb 2, 2004 Harsco Corporation 49 U.S.C. 5101, 171.2
CHI-04-006 Jan 14, 2004 U.S. Department of Agriculture 49 U.S.C. 5101, 49 U.S.C. 5102, 49 U.S.C. 5126, 171.2, 171.8, 173.6
CHI-03-001 Jun 27, 2003 Department of California Highway Patrol 49 U.S.C. 5125, 107.201, 172.802
CHI-02-001 Jun 26, 2002 J.H. Walker Trucking 171.1, 171.8, 49 U.S.C. 5125
CHI-01-002 May 29, 2001 International Warehouse Logistics Association 107.1
CHI-01-003 Jan 24, 2001 Richard Siani and Mochael Law 49 U.S.C. 5102
CHI-00-001 May 22, 2000 Washington Metropolitan Area Transit Authority 49 U.S.C. 5103, 107.606, 170.601, 171.8
CHI-99-002 Aug 8, 1999 Majestic Distilling Company, Inc. 171-180
CHI-98-003 Aug 13, 1998 Westchester County 49 U.S.C. 5125, 107.201, 171.8, 172.701, 172.704, 383.21, 396.11
CHI-98-002 Apr 10, 1998 Southern California Edison 49 U.S.C. 5125, 107.201
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-97-007 May 16, 1997 Center for Legal and Social Justice Immigration and Human Rights Clinic 49 U.S.C. 5125, 107.201, 171.8, 174.14, 177.800, 263.12
CHI-97-006 Apr 17, 1997 McKenna & Cuneo, LLP 49 U.S.C. 5125, 107.201, 174.14
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-95-003 Oct 20, 1995 Maryland Department of the Environment 49 U.S.C. 5125, 49 U.S.C. 5102, 45 U.S.C. 421, 171.1
CHI-95-002 Aug 28, 1995 Dr. Burton Z. Davidson 171.15, 171.16, 173.268
CHI-95-001 Jun 13, 1995 U.S. EPA 171.1, 171.8, 49 U.S.C. 5125, 49 U.S.C. 5126, 49 U.S.C. 5102
CHI-94-005 Sep 26, 1994 California Environmental Projection Agency 49 USC 5102
CHI-94-009 Aug 9, 1994 Electrochemical Products, Inc. 49 U.S.C. 5125, 49 U.S.C. 5110, 107.201, 107.211
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-94-006 Jan 24, 1994 Michigan State Police 49 App. U.S.C. 1811, 107.201
CHI-94-007 Jan 24, 1994 Minnesota Department of Transportation 49 App. U.S.C. 1804, 49 App. U.S.C. 1811, 107.201, 177.824, 180.407
CHI-93-001 Jun 3, 1993 Horton, Knox, Carter, & Foote 107.606, 107.601-107.620, 171.8
CHI-93-002 Jun 3, 1993 U.S. Department of Energy 107.606, 173.7, 107.600, 49 App. U.S.C. 1801, 49 App. U.S.C. 1818, 49 App. U.S.C. 1804, 49 App. U.S.C. 1820, 177.806
CHI-92-002 Oct 13, 1992 Nuclear Regulatory Commission 49 App. U.S.C. 1801, 49 App. U.S.C. 1818, 173, 173.7, 177.806
CHI-92-001 Apr 1, 1992 Georgia Ports Authority 49 App. U.S.C. 1801, 49 App. U.S.C. 1802, 49 App. U.S.C. 1804, 49 App. U.S.C. 1808
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