The matters taken in this chapter draw together all the threads in the final reckoning. They start with the mechanisms for paying the contractor during and soon after construction, on a provisional basis for work and materials already supplied, but not in advance of supply. They follow through the immediate physical completion of work and the subsequent liabilities over defects and their remedying. These stretch beyond the final account and payment, which top up what has been paid on account. In the closing days of the contract at final payment there still remains the possibility of arbitration over disputed matters, which may not be completed until after the close proper . Well beyond lies the possibility of legal action by the employer for a number of years over some classes of defects in design and work.