A/RES/50/6 Page 6 complexity of the work of the United Nations in the humanitarian and refugee assistance fields. 13. We are determined to: - Build and maintain justice among all States in accordance with the principles of the sovereign equality and territorial integrity of States; - Promote full respect for and implementation of international law; - Settle international disputes by peaceful means; - Encourage the widest possible ratification of international treaties and ensure compliance with the obligations arising from them; - Promote respect for and the implementation of international humanitarian law; - Promote the progressive development of international law in the field of development, including that which would foster economic and social progress; - Promote respect for and implementation of international law in the field of human rights and fundamental freedoms and encourage ratification of or accession to international human rights instruments; - Promote the further codification and progressive development of international law. UNITED NATIONS ORGANIZATION 14. In order to be able to respond effectively to the challenges of the future and the expectations of the United Nations held by peoples around the world, it is essential that the United Nations itself be reformed and modernized. The work of the General Assembly, the universal organ of the States Members of the United Nations, should be revitalized. The Security Council should, inter alia, be expanded and its working methods continue to be reviewed in a way that will further strengthen its capacity and effectiveness, enhance its representative character and improve its working efficiency and transparency; as important differences on key issues continue to exist, further in-depth consideration of these issues is required. The role of the Economic and Social Council should be strengthened to enable it to carry out effectively, in the modern age, the tasks it has been assigned with respect to the well-being and standards of life of all people. These and other changes, within the United Nations system, should be made if we are to ensure that the United Nations of the future serves well the peoples in whose name it was established. 15. In order to carry out its work effectively, the United Nations must have adequate resources. Member States must meet, in full and on time, their obligation to bear the expenses of the Organization, as apportioned by the General Assembly. That apportionment should be established on the basis of criteria agreed to and considered to be fair by Member States. /...