A/CONF.171/13 English Page 100 the needs of adolescents and the rural and the urban poor, and on ensuring the safety of services and their responsiveness to women, men and adolescents. In mobilizing resources for these purposes, countries should examine new modalities such as increased involvement of the private sector, the selective use of user fees, social marketing, cost-sharing and other forms of cost recovery. However, these modalities must not impede access to services and should be accompanied with adequate "safety net" measures. 13.23. Governments, non-governmental organizations, the private sector and local communities, assisted upon request by the international community, should strive to mobilize the resources needed to reinforce social development goals, and in particular to satisfy the commitments Governments have undertaken previously with regard to Education for All (the Jomtien Declaration), the multisectoral goals of the World Summit for Children, Agenda 21 and other relevant international agreements, and to further mobilize the resources needed to meet the goals in the present Programme of Action. In this regard, Governments are urged to devote an increased proportion of public-sector expenditures to the social sectors, as well as an increased proportion of official development assistance, stressing, in particular, poverty eradication within the context of sustainable development. 13.24. Governments, international organizations and non-governmental organizations should collaborate on an ongoing basis in the development of precise and reliable cost estimates, where appropriate, for each category of investment. /...