8.—(1) A person shall not use a vessel for the purpose of oyster fishing in any part of the Foyle Area unless the requirements set out in paragraph (2) are met.
(2) The requirements are—
(a)the number of the oyster fishing licence in which the vessel is named shall be displayed with distinct figures on each side of the bow and no vessel shall have displayed on its bow more than one such licence number;
(b)such figures shall be not less than 15 centimetres in height and not less than 2.5 centimetres in breadth;
(c)such figures shall be displayed in white on a black background using materials capable of withstanding the marine environment; and
(d)such figures shall not be effaced, covered or obscured in any manner whatsoever.