(1) Rule 65.12 does not apply in commercial matters. After trial or earlier conclusion of the proceedings the court will (in the absence of agreement) determine —
(a) which (if any) party should pay costs to another party; and
(b) how much in principle (taking into account the provisions of rule 64.6 and any other matter appearing to the court to be relevant in all the circumstances to the incidence of costs in the proceedings) of the costs of the receiving party are to be paid by the paying party.
(2) Having made its determination under paragraph (1), the court will direct that the costs be the subject of a detailed assessment upon the principles as so determined; the court may direct that the assessment be carried out by the Commercial Division judge or may direct that they be assessed by the master (or such other officer of the court as may from time to time be charged with making such assessment).
(3) Unless the court otherwise orders, the costs payable by the paying party pursuant to paragraph (1) shall be paid within 14 days after final determination of the assessment made pursuant to paragraph (2).
(4) The provisions of rules 65.13 to 65.19 shall apply to the quantification of any costs which the court orders.