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.

The latest information on the Coronavirus Disease 2019 (COVID-19) is available on

United States Department of Transportation United States Department of Transportation

Advisory: Guidance on the Application of 49 CFR Section 385.403; Who Must Hold a Safety Permit?

The Federal Motor Carrier Safety Administration (FMCSA) is issuing this advisory to motor carriers and shippers of hazardous materials requiring a Hazardous Materials Safety Permit (HMSP) pursuant to 49 CFR § 385.403. This advisory is intended to clarify when FMCSA will issue a HMSP and the process when a motor carrier has been issued a HMSP and no longer transports materials requiring a HMSP. This advisory also serves as a reminder to motor carriers as to the proper procedures for applying for and renewing a HMSP.  Finally, this advisory addresses whether a HMSP is required for the transportation of anhydrous ammonia.

Last updated: Thursday, October 26, 2017