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Section §171.2: General requirements

Below are the available interpretations and guidance for the given section. To return to the list of parts, use the Parts link above. If you do not see any guidance or interpretation information below, that means there is none available for the given part/section. Return to the search page to browse additional regulations sections.

PHMSA has published several Frequently Asked Questions (FAQ) documents on regulatory topics. Please review our FAQ documents below:

Additionally PHMSA has Hazardous Materials FAQs based on letters of interpretation on the following topics:

This section of the website provides the ability to find regulations information including regulations parts, content of sections, and interpretations for regulations sections. Below is a list of parts, identified by the part number and subject. To browse sections by part, click on the subject link below. You will be taken to the eCFR website to view sections for a part.

A written regulatory interpretation, response to a question, or an opinion concerning a pipeline safety issue may be obtained by submitting a written request to the Office of Pipeline Safety (PHP–30), PHMSA, U.S. Department of Transportation, 1200 New Jersey Avenue SE., Washington, DC 20590–0001 or at the email address: In addition to email address, the requestor must include his or her return address and should also include a daytime telephone number. Requests should be submitted at least 120 days before the time the requestor needs a response.

Note: electronic submission is provided as alternative to the 49 CFR Part 190.11(b) mail-in requirement.

The regulations text of the section can be found on the eCFR website. To view the regulations text, use the link below. For assistance, please send an email to

View section 171.2 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
23-0003 Denver Fire Department Chris Bartlett View
23-0005 Steve Laughlin View
22-0123 R@K Testing Rich Kovaleski View
22-0012 Regulatory Resources, Inc. W. A. Winter View
21-0107 Amanda White View
21-0022 Hazmat Safety Consulting Bob Richard View
20-0087 DHL Global Forwarding Philip Poland View
21-0001 Oilmen’s Truck Tanks Robert Strong View
20-0025 Entergy Donnie James View
19-0043 Haley Hoewt View
18-0155 Canal Terminology Company Cindy Van Duyne View
18-0063 Daniels Training Service, Inc. Daniel Stoehr View
18-0042 Defense Logistics Agency Aviation David R. Carns View
18-0111 Texas Highway Patrol Corporal Casey Jones View
18-0046 Hawks Logistics Steve Hawks View
18-0059 Global First Mr. Thomas Brennan View
09-0260 Regulatory Resources, Inc. Mr. Wade A. Winters View
14-0198 Denton Police Department Mr. Wm. Scott Burson View
10-0251 PBI Technology, Inc. Mr. Paul Bess View
10-0192 Scopelitis, Garvin, Light, Hanson & Feary Mr. Timothy Wiseman View
11-0310 Dannemiller Associates, Inc. Mr. Larry Dannemiller View
15-0148 New Jersey State Police Lt. John V. Guzzo View
03-0251 URS Corporations Mr. Andrew N. Romach View
CHI-94-001 Swidler & Berlin Lawrence W. Bierlein View
08-0137 National Motor Freight Traffic Association, Inc. Ms. Lisa K. Winter View
17-0026 Mr. John Hardridge View
16-0037 US Zinc Mr. John Williams View
06-0085 The UPS Store Ms. Nancy Kasza-Scott View
98-0207 MMA Mr. William J. Schuchman View
05-0236 Fisher Scientific International Mr. John 0. Mayfield, DGSA View
11-0005 Suttons International Mr. David Brown View
00-0109 Mr. Todd Nash View
05-0246 Air Products and Chemicals, Inc. Ms. Genette Fields-Smith View
14-0033 Canyon State Oil Mr. Jason Delto View
09-0251 Foth Infrastructure & Environment, LLC Ms. Michele L. Frozena View
14-0058 Transportation Systems Solutions Mr. Peter Olsen View
06-0137 Department of the Army Ms. Lauren Oleksyk View
12-0185 Missouri Department of Natural Resources Ms. Kathy Flippin View
16-0053 ASCM- FedEx Freight Mr. Frank Horvat View
07-0093 N. Wood Counter Laboratory, Inc. Ms. Marjory Crawford View
16-0061 XPO Logistics Mr. Jeff Messe View
13-0191 Garland Welding Supply Mr. Andrew Simmons View
CHI-98-001 National Tank Truck Carriers, Inc. Clifford J. Harvison View
12-0082 Silberline Manufacturing Co., Inc. Mr. Tom Shober View
CHI-89-001 National Tank Truck Carriers, Inc. Clifford J. Harvison View
13-0165 Con-Way Truckload Mr. Jeff Messer View
06-0077 Scopelitis, Garvin, Light & Hanson Mr. Timothy W. Wiseman View
16-0030 Pioneer Tank Lines, Inc Mr. Larry Nielsen View
09-0148 Mr. Peter Collins U.S. Department of Justice Federal Bureau of Prisons View
05-0057 ICI Paint; Exports & Licensing Ms. Julie Naus View
06-0216 Wiley Rein and Feuding LLP Mr. George A. Kerchner  View
14-0146 Det-Tronics Mr. Lee Zwiefelhofer View
14-0164 PCS Sales (USA), Inc. Mr. Tracey Smith View
05-0060 Airspeed Press Mr. Steven Lindblorn View
CHI-10-0114 FMCSA Office of Enforcement and Compliance View
CHI-04-006 U.S. Department of Agriculture Mr. Wesley Throop View
16-0043 Cliff Bartley Consulting Mr. Cliff Bartley View
CHI-06-0085 The UPS Store Nancy Kasza-Scott View
13-0035 Con-Way Truckload Mr. Jeff Messer View
00-0344 Arrowhead Industrial Services, Inc. Mr. RG Wilson View
10-0245 Air Transport International, L.L.C. Mr. Dave Bell View
11-0260 W.E. Train Consulting Mr. Gene Sanders View
CHI-04-007 Harsco Corporation Russel S. Swanger, Jr., Esq. View
04-0034 University of California, Irvine Mr. Chris Younghans-Haug View