A/RES/S-21/2 Page 8 25. The international community should extend assistance and support to programmes in developing countries that host the majority of refugees and displaced persons. Assistance should also be extended to programmes in countries lacking the capacity to manage large flows of migrants and displaced persons. 26. All States are encouraged to become parties to the 1951 Convention3 and the 1967 Protocol4 relating to the Status of Refugees and put in place effective asylum procedures. 27. Governments, with the assistance of the international community, should intensify their efforts to improve data collection and analysis, including gender-based analysis, in the areas of international migration and, in this context, promote the implementation of the United Nations recommendations on statistics of international migration; encourage studies designed to assess the causes of international migration and displacement and the positive contribution that migration makes to both countries of origin and countries of destination; and improve understanding of the links between relevant factors that have an impact on international migration. 28. The international community should channel adequate support to effective programmes to address the causes of movement of refugees and displaced persons. 29. In planning and implementing refugee assistance activities, special attention should be given to the specific needs of refugee women and children and elderly refugees. Adequate and sufficient international support should be extended to meet the basic needs of refugee populations, including the provision of access to adequate accommodation, education, protection from violence, health services, including reproductive health and family planning, and other basic social services, including clean water, sanitation, and nutrition. Refugees should respect the laws and regulations of their countries of asylum. Governments are urged to abide by international law concerning refugees, inter alia, by respecting the principle of non-refoulement. In acknowledging refugees' rights to repatriation, their return and integration should be facilitated in cooperation with relevant international organizations. D. Internal migration, population distribution and urban agglomerations 30. Governments should carry out research to strengthen the understanding of the factors, trends and characteristics of internal migration and geographical distribution of the population in order to provide grounds for the formulation of effective population distribution policy. 31. Governments should improve the management and delivery of services for the growing urban agglomerations and put in place enabling legislative and administrative instruments and adequate financial resources to meet the needs of all citizens, especially the urban poor, internal migrants, older persons and the disabled. 3 United Nations, Treaty Series, vol. 189, No. 2545. 4 Ibid., vol. 606, No. 8791. /...