A/RES/53/68 Page 4 (d) To take all necessary steps to enlist worldwide support among Governments, as well as national and international organizations, for the achievement of the objectives of the Declaration and the implementation of the relevant resolutions of the United Nations; 12. Calls upon the administering Powers to continue to cooperate with the Special Committee in the discharge of its mandate and to receive visiting missions to the Territories to secure first-hand information and to ascertain the wishes and aspirations of their inhabitants; 13. Also calls upon the administering Powers that have not participated in the work of the Special Committee to do so at its 1999 session; 14. Requests the Secretary-General, the specialized agencies and other organizations of the United Nations system to provide economic, social and other assistance to the Non-Self-Governing Territories and to continue to do so, as appropriate, after they exercise their right to self-determination, including independence; 15. Requests the Secretary-General to provide the Special Committee with the facilities and services required for the implementation of the present resolution, as well as of the other resolutions and decisions on decolonization adopted by the General Assembly and the Special Committee. 78th plenary meeting 3 December 1998