6.—(1) For the purposes of section 1(1) of the Act (which prohibits the landing in Scotland of any sea fish of any description, which does not meet such requirements as to size as may be prescribed in relation to sea fish of that description), in relation to landing in the Orkney Islands, there is prescribed as the minimum size in relation to sea fish of the description of green crab a size of 70 millimetres.
(2) Landing from foreign fishing boats is exempted from the prohibition imposed by section 1(1) of the Act, as read with paragraph (1).
(3) In this article—
“green crab” means crab of the species Carcinus maenas; and
“size”, in relation to a green crab, means the maximum width of the carapace (including the spines) measured perpendicular to the antero-posterior midline of the carapace and is to be measured as shown in schedule 4.