At the request of at least one party, the opposition division must fixThe formalities officer is entrusted with fixing the amount of the costs to be paid to the beneficiary at the request of at least one partyunder a decision apportioning them. The request from a party to the proceedings to fix the costs is admissible only if the decision in which the apportionment of costs was orderedapportioning the costs has become final.
A billlist of costs, with supporting evidence in respect of each amount involved, must be attached to the request. Costs may be fixed once their credibility is established.
The parties will be notified of the costs as fixed by the formalities officer acting for the opposition division.
For an explanation of the duties entrusted to the formalities officersthe allocation of the duty of fixing the costs, see D‑II, 7.