49 CFR § 385.405T - How does a motor carrier apply for a safety permit?
(a) Application form(s).
(2) The Form MCS–150B will also satisfy the requirements for obtaining and renewing a USDOT Number; there is no need to complete Form MCS–150, Motor Carrier Identification Report.
(b) Where to get forms and instructions. The forms listed in paragraph (a) of this section, and instructions for completing the forms, may be obtained on the internet at http://www.fmcsa.dot.gov, or by contacting FMCSA at Federal Motor Carrier Safety Administration, Office of Registration and Safety Information (MC–RS), 1200 New Jersey Ave. SE, Washington, DC 20590–0001 or by telephone at 1–800–832–5660.
(d) Updating information on Form MCS–150B. A motor carrier holding a safety permit must report to FMCSA any change in the information on its Form MCS–150B within 30 days of the change. The motor carrier must use Form MCS–150B to report the new information (contact information in paragraph (b) of this section).
The following state regulations pages link to this page.