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 #09-0020 ([Horizon Lines, LLC] [Mr. Cliff Bartley])

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

Interpretation Response Details

Response Publish Date:

Company Name: Horizon Lines, LLC

Individual Name: Mr. Cliff Bartley

Location State: FL Country: US

View the Interpretation Document

Response text:

August 24, 2009



Mr. Cliff Bartley

Horizon Lines, LLC

5800-1 William Mills Street

Jacksonville, FL 32226

Reference No. 09-0020

Dear Mr. Bartley:

This is in response to your e-mail dated January 30, 2009, asking us to consider harmonizing requirements in the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to permit "UN 1512, Zinc ammonium nitrite, 5.1 (oxidizer), PG II" with requirements in the International Maritime Dangerous Goods Code (IMDG Code). We apologize for the delay in responding and any inconvenience this may have caused.

As you note in your e-mail, the HMR permit the transportation of zinc ammonium nitrate by vessel while the IMDG Code prohibits such transportation. We are reviewing this issue and may consider addressing the inconsistency in a future rulemaking.

I hope this satisfies your request.


Hattie L. Mitchell

Chief, Regulatory Review and Reinvention

Office of Hazardous Materials Standards


Regulation Sections

Section Subject
172.101 Purpose and use of hazardous materials table