(1) On receipt of a notice of objection under regulation 14 , the Registrar is to (a) fix a date, time and place for an assessment of costs; and(b) notify the parties accordingly.(2) At an assessment of costs, the Registrar may allow or disallow costs including costs in respect of the assessment.(3) An assessment of costs may proceed in the absence of any party.(4) Within 48 hours after making an assessment of costs, the Registrar is to (a) issue a certificate of assessment; and(b) provide a copy of that certificate to the parties.(5) If the disallowed costs represent one-sixth or more of the allowed costs specified in the certificate of assessment (a) the successful party is not entitled to any costs in respect of the assessment; and(b) costs in respect of the assessment may be awarded to an unsuccessful party.