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Section §173.427: Transport requirements for low specific activity (LSA) Class 7 (radioactive) material and surface contaminated objects (SCO)

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 173.427 on the ECFR website

Interpretation Responses

Ref ID Date Company Name Individual Name Response Document
21-0036 Entergy Operations Inc. Donnie James View
13-0101 Regulatory Resources, Inc. Mr. W.A. Winters View
98-0112 Radioactive Waste Acceptance Program Mr. Michael Noland View
98-0125 Waste Management Federal Services Mr. J.G. Field View
09-0231 Fermi 2 Mr. Rodney Johnson View
08-0013 Idaho State Police Mr. Thomas Wright View
04-0147 MHF Logistical Solutions Mr. Kurt Colborn View
08-0079 Washington Closure Hanford Mr. G.J. Borden View
05-0151 RWE NUKEM Corporation Mr. Stanley M. Hodges, Jr. View
04-0105 Cerac, Inc Ms. Candace Graf View
05-0138 MHF Logistical Solutions Mr. Kurt Colborn View
10-0001 U.S. Department of Energy Ms. Dana Willaford View
02-0278 Defense Logistics-Agency F. Kevin Reilly View
07-0115 Mr. Philip Brandt View
10-0032 Energy Solutions Mr. James H. Portsmouth View
15-0195 Prairie Island Nuclear Generating Plant Mr. Clay Sweet View
04-0062 Vanderbilt Chemical Corporation Mr. Joe Curtis View
04-0199 Office of Environmental Management, U.S. Department of Energy, EM-l1 Mr. Dennis Ashworth View