53.       In reckoning any period of time for the purposes of any limitation period in relation to the making of an application for adjudication of a bill of costs under Part 10 which bill of costs is or has been the subject of a complaint under this Part, the period beginning on the making of a complaint to the Authority or, where the complaint is made on the invitation of the Authority under section 52(3), on the making of the complaint referred to in subsection (1) or (2) of section 52, and ending—

(a) on the date on which the complaint is withdrawn by the complainant, or

(b) where the complaint is not withdrawn by the complainant, on the date that is 2 months after the date on which the complaint is determined under this Part,

shall be disregarded.