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Section §173.3: Packaging and exceptions

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 173.3 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0036 Haz-Mat One Mr. Travis Hillmer View
22-0006 Daniels Training Services Inc. Mr. Daniel Stoehr View
20-0081 Stablex US ecology Pierre-Olivier Gagné View
09-0227 Battery Council International Wiley Rein LLP Mr. Timothy J. Lanfond View
03-0077 Waste Technology Services, Inc. Mr. T.L. Nebrich, Jr. View
08-0003 Transportation Skills Programs, Inc. & Hazardous Materials Publishing Co., Inc. Mr. Robert J. Keegan View
99-0010 Blue Grass Chemical Activity Mr. Kirk Kopitzke View
12-0155 Scopelitis, Garvin, Light, Hanson & Fears Mr. Timothy W. Wiseman, Esq. & Mr. Jeffrey S. Jackson, Esq. View
13-0019 G2 Revolution LLC Mr. Troy Erickson View
99-0317 Department of Energy Mr. Steven H. Wisness View
15-0015 FedEx Express Mr. Marvin Sudduth View
02-0154 U. S. Department of Energy Kent Hancock View
15-0072 Compliance Plus Servicves, Inc. Ms. Denise Ernest View
06-0152 Hunton & Williams LLP Mr. Brooks M. Smith  View
09-0124 Parsons Corporation Newport Chemical Depot NECDF Mr. Lawrence S. Thompson View
07-0008 U.S. Department of Energy Mr. Dennis Ashworth View