Section 160.203 - Applicability(a) This subpart applies to the following vessels that are bound for or departing from ports or places within the navigable waters of the United States, as defined in 33 CFR 2.36(a) , which includes internal waters and the territorial seas of the United States, and any deepwater port as defined in 33 CFR 148.5 :(1) U.S. vessels in commercial service, and(b) Unless otherwise specified in this subpart, the owner, agent, master, operator, or person in charge of a vessel regulated by this subpart is responsible for compliance with the requirements in this subpart.(c) Towing vessels controlling a barge or barges required to submit an NOA under this subpart must submit only one NOA containing the information required for the towing vessel and each barge under its control.USCG-2002-11865, 68 FR 9543, Feb. 28, 2003, as amended by USCG-2004-19963, 70 FR 74669, Dec. 16, 2005. Redesignated and amended at 80 FR 5330, 5331, Jan. 30, 2015