Sustainable fisheries, including through the 1995 Agreement for the Implementation of the Provisions of the United Nations Convention on the Law of the Sea of 10 December 1982 relating to the Conservation and Management of Straddling Fish Stocks and Highly Migratory Fish Stocks, and related instruments A/RES/71/123 Seabirds in Longline Fisheries and taking into account the work of the Agreement on the Conservation of Albatrosses and Petrels and of organizations, such as the Commission for the Conservation of Antarctic Marine Living Resources; IX Subregional and regional cooperation 137. Urges coastal States and States fishing on the high seas, in accordance with the Convention, the Agreement and other relevant instruments, to pursue cooperation in relation to straddling fish stocks and highly migr atory fish stocks, either directly or through appropriate subregional or regional fisheries management organizations or arrangements, to ensure the effective conservation and management of such stocks; 138. Urges States fishing for straddling fish stocks and highly migratory fish stocks on the high seas, and relevant coastal States, where a subregional or regional fisheries management organization or arrangement has the competence to establish conservation and management measures for such stocks, to give e ffect to their duty to cooperate by becoming members of such an organization or participants in such an arrangement, or by agreeing to apply the conservation and management measures established by such an organization or arrangement, or to otherwise ensure that no vessel flying their flag is authorized to access the fisheries resources to which regional fisheries management organizations and arrangements or conservation and management measures established by such organizations or arrangements apply; 139. Invites, in this regard, subregional and regional fisheries management organizations and arrangements to ensure that all States having a real interest in the fisheries concerned may become members of such organizations or participants in such arrangements, in accordance with the Convention, the Agreement and the Code, provided they have shown their interest in and capacity to comply with the measures adopted by the regional fisheries management organizations and arrangements concerned, including their willingness to effectively exercise flag State control, while recognizing the need to enhance the capacity of developing States in this regard; 140. Encourages relevant coastal States and States fishing on the high seas for a straddling fish stock or a highly migratory fish stock, where there is no subregional or regional fisheries management organization or arrangement to establish conservation and management measures for such stocks, to cooperate to establish such an organization or enter into another appropri ate arrangement to ensure the conservation and management of such stocks, and to participate in the work of the organization or arrangement; 141. Welcomes in this regard the progress in the preparation of a draft convention on future multilateral cooperation in the Red Sea and Gulf of Aden; 142. Urges signatory States and other States whose vessels fish within the area of the Convention on the Conservation and Management of Fishery Resources in the South-East Atlantic Ocean 25 for fishery resources covered by that Convention to become parties to that Convention as a matter of priority and, in the interim, to ensure that vessels flying their flags fully comply with the measures adopted; _______________ 25 United Nations, Treaty Series, vol. 2221, No. 39489. 27/40