s 83G Bringing of appeals
(1) An appeal under section 83 is to be made to the tribunal before— (a) the end of the period of 30 days beginning with— (i) in a case where P is the appellant, the date of the document notifying the decision to which the appeal relates, or (ii) in a case where a person other than P is the appellant, the date that person becomes aware of the decision, or (b) if later, the end of the relevant period (within the meaning of section 83D). (2) But that is subject to subsections (3) to (5). (3) In a case where HMRC are required to undertake a review under section 83C— (a) an appeal may not be made until the conclusion date, and (b) any appeal is to be made within the period of 30 days beginning with the conclusion date. (4) In a case where HMRC are requested to undertake a review in accordance with section 83E— (a) an appeal may not be made— (i) unless HMRC have notified P, or the other person, as to whether or not a review will be undertaken, and (ii) if HMRC have notified P, or the other person, that a review will be undertaken, until the conclusion date; (b) any appeal where paragraph (a)(ii) applies is to be made within the period of 30 days beginning with the conclusion date; (c) if HMRC have notified P, or the other person, that a review will not be undertaken, an appeal may be made only if the tribunal gives permission to do so. (5) In a case where section 83F(8) applies, an appeal may be made at any time from the end of the period specified in section 83F(6) to the date 30 days after the conclusion date. (6) An appeal may be made after the end of the period specified in subsection (1), (3)(b), (4)(b) or (5) if the tribunal gives permission to do so. (7) In this section “conclusion date” means the date of the document notifying the conclusions of the review.