(1) Where costs are incurred improperly or without reasonable cause or are wasted by undue delay or negligence or by any other misconduct or default or where from any other cause the amount of costs is excessive—
(a) only costs which were reasonable and proper shall be allowed; and
(b) the Costs Court may assess those costs at a gross sum.
(2) The Costs Court may apportion costs assessed under paragraph (1) among different parties.