4. Subject to paragraph 5, notice of appeal in accordance with paragraph 1 is to be given, in the case of an appeal against a decision to—
(a)refuse an authorisation, before the expiry of 3 months beginning with the date of the decision; or
(b)suspend or revoke an authorisation—
(i)where a period of notice is given in the notice, before the date on which the suspension or revocation takes effect; or
(ii)where immediate, before the expiry of 3 months beginning with the date of the suspension or revocation.