Section 3 restricts entering of foreign sea fishing boats in the exclusive fishery limits of Ireland. "Exclusive fishery limits" is defined here as that portion of the seas within which citizens of Saorstát Eireann have, by international law, the exclusive right of fishing".... In accordance with provisions of section 4, the Minister may from time to time by bye-laws prohibit the use, within the waters of any specified area, in or from either, as may be specified in such bye-laws, any boat or an