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Section §173.63: Packaging 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 173.63 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
22-0128 D.T. Gruelle Company Group LLC Mr. James F. Thornton View
12-0100 Hilti North America Mr. Brandon Kapple View
02-0157 Gislason & Hunter LLP Gary W. Koch View
14-0201 ESCI EnviroServices, Inc Mr. Steven M. Lichten View
99-0107 National Distribution Warehouse Mr. Marlyn Boyce View
12-0052 Doughty & Carson, PLLC Mr. Oliver D. Adams Hodges View
05-0089 Georgia Department of Motor Vehicle Safety Capt. Bruce Bugg View
09-0104 Compania SudAmericana De Vapores Mr. Hector Alvarez View
12-0041 ATK Corporate Transportation Compliance Mr. Patrick Watson View
07-0044 western Kentucky University Mr. Christopher J. Widman View
04-0004 ATK Alliant Teclisystems Mr. Christopher J. Widinan View
06-0167 Cooper Power Systems, Inc. Mr. Darren Shequen View
09-0139 Mr. Thomas Leech View
08-0152 North American Services Group Mr. Bill Youngs View
11-0066 Boyle Transportation Mr. Rick Araniz View
13-0007 Wakefield Drilling & Blasting Mr. Darren Wakefield View