14.—(1) In calculating any time specified in Schedule 1 there shall be disregarded any day falling before the day on which notice was given of a correction of a decision or the record thereof pursuant to regulation 12 or on which notice is given that a determination of a decision shall not be set aside following an application under regulation 13, as the case may be.
(2) There shall be no appeal against a correction made under regulation 12 or a refusal to make such a correction or against a determination under regulation 13.
(3) Nothing in regulation 12 or 13 shall be construed as derogating from any inherent or other power to correct errors or set aside decisions which is exercisable apart from these Regulations.