Building and Development Certifiers Regulation 2020

if the certification work involves the determination of an application for a development certificate—require the fees and charges payable for the determination (excluding any fees and charges for work arising as a result of unforeseen contingencies) to be paid on or before the lodgment of the application, and

if the certification work involves the carrying out of functions of a principal certifier—require the fees and charges payable for carrying out those functions in respect of particular development (excluding any fees and charges for work arising as a result of unforeseen contingencies) to be paid before the functions are carried out in respect of that development, and

if the contract provides for payment of fees and charges for carrying out work arising as a result of unforeseen contingencies—provide for invoices to be issued within 21 days after the completion of that work.