“appealable registration decision” shall be construed in accordance with paragraphs 2 and 3(2) F2and (4);

“person concerned” means a person notified under paragraph 3(1) of an appealable registration decision made in respect of him, or, as the case may be, an applicant in respect of whom an appealable registration decision is treated as having been made by virtue of paragraph 3(2) F3or (4); and

“the requisite period”, in relation to a decision of a kind specified in paragraph 2(1)(a), F4(ab), (c), (e), (f) or (h), means the period of four months beginning with the date when the registrar is first in possession of sufficient information to make the decision.