Haw. Code R. § 19-42-11
Any owner, master, operator, agent, charterer, partnership, trust, corporation, or individual who is duly accredited with the department and purports to act for a vessel by telephoning or otherwise communicating with the department in behalf of a vessel assumes responsibility for all sums due the State in accordance with the fee schedules as set forth in these rules and for timely submission of required department reports on forms provided by the department for that vessel and its cargo as well as for any barge and its cargo as well as for any barge and its cargo which the vessel may have in tow. For agents, this applies only for the period they are engaged as agents for the vessel. If an agent is dismissed from representing a vessel, the agent shall notify the harbor master's office within two working days. Agent shall remain responsible for the provisions of this section until such notice is given and acknowledged.
Whenever any vessel under the terms of these rules shall become obligated to pay any sum of money for any purpose whatsover, the owner, charterer, agent, master, operator, possessor, and person in whose service the vessel is operated or maintained shall be jointly and severally liable for the payment of such sums.
Haw. Code R. § 19-42-11