10A person who is prosecuted for an offence against this Act and who is the holder of a fishing or general licence shall either—
(a)cause it to be delivered to the clerk of the court not later than the day before the date appointed for the hearing, or
(b)post it, at such a time that in the ordinary course of post it would be delivered not later than that day, in a letter duly addressed to the clerk and either registered or sent by the recorded delivery service, or
(c)have it with him at the hearing ;
and if he is convicted of the offence and the court makes an order under paragraph 9 above the court shall order the licence to be surrendered to it ;¢ and if the offender has not posted the licence or caused it to be delivered as aforesaid and does not surrender it as required then he shall be guilty of an offence and the licence shall be revoked from the time when its surrender was ordered.