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.

Rulemaking and Guidance Procedures

Order Number
DOT 2100.6A
Originating Office
OST-C (General Counsel)
Order Effective Date
06/07/2021
Last updated: Monday, June 7, 2021