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Section §172.204: Shipper's certification

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 172.204 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
24-0002 International Isotopes Inc. John J. Miller View
22-0037 Linde Gas & Equipment Inc. Mike Stephens View
21-0067 Transportation Compliance Associates, Inc. Michael D. Alston View
21-0047 Safeway Transportation Richard Elliott View
20-0073 John B. Woodbury View
20-0007 Oxyde Chemicals, Inc. Mr. Adrian Medina View
19-0056 Woodard & Curran Kelly Camp View
19-0081 North American Transportation Consultants William Herman View
18-0097 CFI Drive Jeff Messer View
08-0134 Hawkins, Inc. Mr. Chris W. Gibson View
16-0037 US Zinc Mr. John Williams View
98-0135 Dreyco, Inc. Mr. Gareth D. Pearce View
08-0015 Fed Ex Freight Ms. Sandra Richesin View
09-0103 Hapag-Lloyd (America), Inc. Mr. Robert F. Ahlborn View
05-0088 Thunderbird Cylinder, Inc. Mr. Fred A. Nachrnan View
06-0110 Computer Sciences Corporation Mr. James R. "Hank" Ellis  View
02-0234 HB Fuller Company Gene Secor View
15-0087 Con-way Freight Ms. Marie Easley-Cook View
16-0114 Renaldo Sales & Service, Inc. Mr. Kerry Fitzgerald View
14-0160 North America Dangerous Cargo (Maersk) Mr. Charles A. Giglia View
00-0023 Cosco North America, Inc. John E. La Gorce View
10-0192 Scopelitis, Garvin, Light, Hanson & Feary Mr. Timothy Wiseman View
06-0053 Pfizer, Inc. Ms. Debbie Hape View
03-0258 URS Corporation Dear Mr. Romach: View
06-0070 Culver Enterprises, Inc. Mr. John Culver View
98-0411 Farmland Industries, Inc. Mr. Jack Curry View
11-0201 Arkema, Inc. Ms. Christina Kurtz View
09-0285 Mr. Brad Bockey View
09-0064 C & N Companies Mr. Jon Bjornstad View
04-0088 Ms. Lisa Marquiss View
05-0137 Worldwide Services Ms. Mary Beth Schommer View
08-0301R APL Americas Region Mr. Calvin Faulkner View
09-0122 Mr. Bill Lewis YRC Reimer View
16-0030 Pioneer Tank Lines, Inc Mr. Larry Nielsen View
10-0132 Entergy Services, Inc. Mr. Joe Hantz View
01-0105 FedEx Ground Safety Department Mr. Jerry W. Freeman View
04-0075 Haz-Mat Transportation Services Mr. Jack Peters View
04-0183 Raytheon Aircraft Company Ms. Karen L. Baxter View
02-0038 Paschall Track Lines, Inc. Melissa Houser View
05-0005 Tyco Healthcare/Mallinckrod Ms. April Chance View
16-0043 Cliff Bartley Consulting Mr. Cliff Bartley View
10-0068 FedEx Express Corporation Mr. David Littlejohn View
10-0053 ATK Mr. Christopher J. Widman View
04-0021 Air Products and Chemicals, Inc Mr. Richard J. Lloyd View
15-0243 Environmental Health & Safety Ms. Marilyn Winterburg View
11-0260 W.E. Train Consulting Mr. Gene Sanders View