2.—(1) Subject to sub-paragraph (2), notice of appeal in accordance with paragraph 1 is to be given–
(a)in the case of an appeal under regulation 22(1), before the expiry of the period of six months beginning with the date of the decision or deemed decision which is the subject matter of the appeal;
(b)in the case of an appeal under regulation 22(2) against a revocation notice, before the date on which the revocation takes effect;
(c)in the case of an appeal under regulation 22(2) against a variation notice, an enforcement notice or a suspension notice, before the expiry of the period of two months beginning with the date of the notice which is the subject matter of the appeal.
(2) The Scottish Ministers may in a particular case allow notice of appeal to be given after the expiry of the periods mentioned in sub-paragraph (1)(a) or (c).