43. CMAL may require a person who incurs or is about to incur a charge to deposit with, or to guarantee, such sum of money as is, in the opinion of CMAL, reasonable having regard to the amount or probable amount of the charge, and where such a person fails to deposit or guarantee the sum of money required by CMAL, CMAL may detain the vessel in the harbour or goods on or in the harbour, in respect of which the charge has been or will be incurred, until the requirement has been complied with or the charge paid.