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Section §171.25: Additional requirements for the use of the IMDG Code

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 171.25 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
23-0104 Chevron Phillips Chemical Company LP Richard Norl Jr. View
23-0081 North American Transportation Consultants, INC. J.P. Gibbons View
23-0066 W.R. Grace & Co - Conn. Mr. Paul Errichetti View
23-0004 APRAGAZ (Notified Body 0029) Chris Vleugels View
21-0064 Ocean Network Express (North America) Inc. Lisa Stone View
19-0072 C. Steinweg, Inc. John Moors View
18-0090 American Bureau of Shipping (ABS) Mr. Michael R. Kloesel View
17-0140 RCN Corporation Richard J. Lloyd View
15-0180 COSMO International Corporation Patricia M. Sobel View
08-0225 Currie Associates, Inc. Mr. Jack Currie View
11-0283 R & L Carriers, Inc. Mr. Gerald A. Krisa View
12-0118 RemTec International Ms. Patricia Burns View
15-0166 ICC Compliance Center Ms. Sändra Miller View
08-0190 Cytec Industries, Inc. Mr. James Sompii View
15-0204 Crowley Liner Service Mr. Michael Lesser View
08-0118 Seaboard Marine Ltd. Mr. John Plasencia View
13-0151 Apragaz V.Z.W. Uw Controle Organisme Mr. Chris Vleugels View
07-0194 HAZMATEAM, Inc. Mr. Paul J. Dambek View
12-0253 Chevron Phillips Chemical Co. LP Mr. Joel T. Robertson View
10-0249 Manager Cytec Industries, Inc. Mr. Charles Schreier View
09-0164 Cytec Industries Inc. Mr. Andrews Bethmann View
13-0020 Cytec Industries, Inc. Mr. Dwayne McNally View
09-0045 DuPont Sourcing & Logistics Mr. Thomas Reese View
10-0094 Akzo Nobel Chemicals, Inc. Mr. Mark A. Connolly View
16-0112 Atlantic Ro-Ro Carriers, Inc. Mr. Andrei Lazourenko View
16-0005 CMA CGM (America), LLC. Mr. Chris Godfrey View
11-0150 Holland & Knight LLP Mr. Jonathan Epstein View