USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Interpretation Response #10-0187 ([Schlumberger Technology Corporation] [Mr. Paul Lezak])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: Schlumberger Technology Corporation

Individual Name: Mr. Paul Lezak

Location State: TX Country: US

View the Interpretation Document

Response text:

October 27, 2010



Mr. Paul Lezak

Schlumberger Technology Corporation

200 Gillingham Ln.

Sugar Land, Texas 77478

Ref. No.: 10-0187

Dear Mr. Lezak:

This responds to your August 24, 2010 email requesting clarification of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you request clarification of the marking and labeling requirements for materials regulated as explosives that are transported from Canada into the United States.

As specified in § 171.12(a), a hazardous material transported from Canada to the United States, from the United States to Canada, or transiting the United States to Canada or a foreign destination may be offered for transportation or transported by motor carrier and rail in accordance with the Transport Canada TDG Regulations as authorized in § 171.22, provided the requirements in §§ 171.22 and 171.23, as applicable, are met.

It should be noted that § 171.23(b)(4) requires that, prior to being transported within the United States, explosive materials must be approved by the Associate Administrator in accordance with § 173.56 and that each package containing a Class 1 (explosive) material must conform to the marking requirements in § 172.320.

I trust this satisfies your inquiry. Please contact us if we can be of further assistance.


Ben Supko

Acting Chief, Standards Development

Office of Hazardous Materials Standards

171.12, 171.22, 171.23

Regulation Sections

Section Subject
171.12 North American Shipments
171.22 Authorization and conditions for the use of international standards and regulations
171.23 Requirements for specific materials and packagings transported under the ICAO Technical Instructions, IMDG Code, Transport Canada TDG Regulations, or the IAEA Regulations