21.—(1) On an application for a firearm certificate relating to a firearm identified in a European firearms pass, the applicant may apply to the Chief Constable for the renewal of the pass.
(2) Where—
(a)a firearm certificate relating to a firearm identified in a European firearms pass is to expire without another firearm certificate for that firearm being granted; but
(b)a firearm certificate relating to another firearm identified in that pass will continue in force after the other firearm certificate expires,
the holder of the pass may apply to the Chief Constable for the renewal of the pass subject to the deletion of the reference to any firearm to which the expiring firearm certificate relates.
(3) Where, on an application to the Chief Constable under paragraph (1) or (2)—
(a)the pass in question is produced to him; and
(b)a firearm certificate relating to a firearm identified in the pass is granted or will continue in force after the time when the pass would (apart from its renewal) have ceased to be valid,
he shall renew the pass, subject to any appropriate deletion, from that time to whichever is the shorter of the periods specified in Article 20(1)(a) and (b).
(4) Where a European firearms pass ceases to be valid without being renewed under this Article, the Chief Constable shall by notice in writing require the person to whom the pass was issued to surrender it; and if that person fails to do so within 21 days from the date of the notice or within such further time as the Chief Constable may in special circumstances allow, he shall be guilty of an offence.