4. Subject to paragraph 5, notice of appeal in accordance with paragraph 1 is to be given—
(a)in the case of an appeal under regulation 50(a), (b) or (c), before the expiry of the period of three 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 50(i), before the date on which the suspension or revocation takes effect;
(c)in the case of an appeal under regulation 50(d), (e), (f), (g),or (h), before the expiry of the period of two months beginning with the date of the notice which is the subject matter of the appeal;
(d)in the case of an appeal under regulation 50(j) or (k), before the expiry of 21 days beginning with the date of the notice which is the subject matter of the appeal.