4. After regulation 9 there shall be inserted the following regulation—
9A.—(1) Accidental errors in a decision of the Secretary of State or an officer of the Board under a relevant enactment within the meaning of section 28(3), or in any record of such a decision, may be corrected by the Secretary of State or an officer of the Board, as the case may be, at any time.
(2) A correction made to, or to the record of, a decision shall be deemed to be part of the decision, or of that record, and the Secretary of State or an officer of the Board shall give a written notice of the correction as soon as practicable to the claimant.
(3) In calculating the time within which an application can be made under regulation 3(1)(b) for a decision to be revised, or the time within which an appeal may be brought under regulation 31(1), there shall be disregarded any day falling before the day on which notice was given of a correction of the decision or to the record thereof under paragraph (2).”.