s 93 Recovery of costs and expenses by instalments
93.—(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 the owner or occupier, the Director‑General may —(a) recover the costs and expenses in the manner provided in this Act; or (b) if he or she thinks fit, obtain an undertaking from the owner or occupier for the payment by any instalments that will be sufficient to defray the whole amount of the costs and expenses. (2) Upon default in payment of any instalment upon the date appointed for payment of the instalment by the undertaking, the whole of the balance then outstanding of the amount immediately becomes due and payable and, despite any change in the ownership or occupation of the premises since the date of the undertaking, may be recovered by the same means and in the like manner as provided in section 92.