49 CFR § 190.305 - Regulatory dockets.
(a) Information and data considered relevant by the Administrator relating to rulemaking actions, including notices of proposed rulemaking; comments received in response to notices; petitions for rulemaking and reconsideration; denials of petitions for rulemaking and reconsideration; records of additional rulemaking proceedings under § 190.325; and final regulations are maintained by the Pipeline and Hazardous Materials Safety Administration at 1200 New Jersey Avenue, SE, Washington, D.C. 20590–0001.
(b) Once a public docket is established, docketed material may be accessed at http://www.regulations.gov. Public comments also may be submitted at http://www.regulations.gov. Comment submissions must identify the docket number. You may also examine public docket material at the offices of the Docket Operations Facility (M–30), U.S. Department of Transportation, West Building, First Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590. You may obtain a copy during normal business hours, excluding Federal holidays, for a fee, with the exception of material which the Administrator of PHMSA determines should be withheld from public disclosure under 5 U.S.C. 552(b) or any other applicable statutory provision.