4.—(1) This article applies for the purposes of Article 9.
(2) No catch that includes unsorted fish may be landed at a harbour unless—
(a)the master of the fishing boat from which the catch is to be landed applies to a British sea-fishery officer at the harbour for a decision as to the suitability of the harbour for landing the catch; and
(b)having regard to the overall size and characteristics of the catch, the British sea-fishery officer—
(i)decides that the sampling systems at the harbour are adequate for the purpose of efficiently monitoring the landing of that catch, and
(ii)notifies the master of his decision in writing.
(3) The master, the owner and any charterer of a fishing boat are each guilty of an offence if a catch that includes unsorted fish is landed from the fishing boat at a harbour before the master has received the decision of a British sea-fishery officer at the harbour in question under paragraph (2)(b)(ii).