s 54 Recovery of costs and expenses by instalments
54.—(1) When the Director-General has incurred costs and expenses in or about the execution of any work, which are, under this Act, payable by or recoverable from an owner, the Director‑General may —(a) recover those costs and expenses in the manner provided in section 53; or (b) if he or she thinks fit, make an arrangement with the owner for the payment of any instalments that will be sufficient to defray the whole amount of the costs and expenses with interest thereon at the prescribed rate, within a period not exceeding 10 years. (2) Upon default in payment of any instalment or interest upon the date appointed for payment thereof by the arrangement, the whole of the balance then outstanding of that amount, together with any interest in arrears, immediately become due and payable and, despite any change in the ownership or occupation of the premises since the date of the arrangement, may be recovered as provided in section 53.