111Payment and collection of charges

111 Payment and collection of charges (1) A charge under this Part is payable on demand by the charging entity that fixed the charge, or at such time, or on such terms, as the entity may determine in respect of the person liable to pay it. (2) Subject to subsection (3), a charge fixed by a port authority may only be collected by that port authority and not by the other port authority. (3) A port authority may appoint an agent for the collection of charges, and the agent may be the other port authority. (4) A charge under this Part may be recovered as a debt due and payable to the charging entity that fixed the charge by the person liable to pay it. (5) If there is more than one person liable to pay a charge under this Part, those persons are jointly and severally liable to pay the charge.