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Section §177.800: Purpose and scope of this part and responsibility for compliance and training

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 177.800 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0086 Fujitrans USA Inc. Laura Warren View
14-0173 Sika Corporation USA Mr. Arthur Van Houten View
CHI-97-007 Center for Legal and Social Justice Immigration and Human Rights Clinic View
12-0013 GeoDynamics Mr. Rick Chewning View
98-0242 Chautauqua Metal Finishing Supply Ms. Patricia A. West View
13-0108 Eastex Crude Company Ms. Kathy Harris View
13-0108R Eastex Crude Company Ms. Kathy Harris View
14-0102 Brighter Horizons Environmental Inc. Mr. John Nelson View
16-0177 Robinson Nevada Mining Company Mr. Matt Thompson View
CHI-11-002 County of San Diego Tom Bosworth View
13-0035 Con-Way Truckload Mr. Jeff Messer View
14-0182 Reagent Chemical Mr. Robert Dritschel View