49 C.F.R. § 1182.3
(a) Each application shall be filed with the Board, complying with the requirements set forth at 49 CFR 1182.8.
(2) If the application involves the merger or purchase of motor passenger carriers (contemplating transfer of operating authorities or registrations from one or more parties to others), one copy of the application shall be delivered, by first-class mail, to:
Federal Motor Carrier Safety Administration, Office of Registration & Safety Information, Chief, Registration, Licensing & Insurance Division, 1200 New Jersey Ave. SE, Mail Stop W65-331, Washington, DC 20590
[63 FR 46397, Sept. 1, 1998, as amended at 83 FR 15080, Apr. 9, 2018]