(1) This section applies if the court orders, under section 4 (1) (b), that the amount of costs to be paid is the amount agreed by the parties.
(2) If the party entitled to costs and the party liable for costs agree that the costs be set at a certain amount (the agreed amount ), either party may file a written agreement to the costs being set at the agreed amount.
(3) The agreement must be signed by the parties or their solicitors.
(4) On the filing of the agreement, the agreed amount is taken to be the amount of costs to be paid.
(5) If the parties cannot agree on the amount, the court may order that the registrar assess costs in accordance with the scale of costs as applied under section 4 (3) (b) and (c).