"In discharging their functions conferred or imposed on him or them by or under the Sea Fisheries Acts, the Minister or Ministers or any relevant body shall, so far as consistent with the proper and efficient discharge of those functions: (a) have regard to the conservation of marine flora and fauna; and (b) endeavour to achieve a reasonable balance between that consideration and any other considerations to which he or they are required to have regard" (sect. 1(1)). "Enactment" does not include an enactment contained in Northern Ireland legislation (sect. 1(2)) but this Act extends to Northern Ireland (sect. 2(3)).