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Section §171.15: Immediate notice of certain hazardous materials incidents

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 171.15 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0068 Detroit Scrap Consulting Services Ty Cox View
22-0024 Keller and Heckman, LLP Trent Doyle View
18-0110 Ascent Resources Utica, LLC Steven Parrish View
18-0043 Ventura County District Attorney's Office Mitchel Disney View
CHI-12-0175 International Union UAW Andrew Comai View
CHI-95-002 Dr. Burton Z. Davidson View
09-0196 Schneider National Bulk Carriers, Inc. Mr. Terry Tavares View
16-0080 Technology Solutions Mr. William Weddle View
16-0153 Emergency Response and Training Solutions Mr. Ed Ballash View
08-0213 FedEx Express Mr. Scott A. Mugno View
10-0232 URS Corporation Ms. Erin Jarman View
14-0056 Responsible Care Coordinator Mr. Nathan Walden View
07-0096 Emergency Response and Training Solutions Mr. George Sabo View
03-0028 Roadway Express Mrs. Lori Leonti View
13-0085 UPS Mr. Samuel S. Elkind View
04-0275 Ms. Amy Dean View
06-0149 Compliant Technologies, Inc. Mr. David Ellis View
07-0052 Compliant Technologies, Inc. Mr. David Ellis View
14-0188 Alaska Air, SEADG Mr. Ron Fink View
04-0049 Ms. Sheila Wolf Ms. Sheila Wolf View