A/RES/57/236 them out; substantial reductions in trade-distorting domestic support; pursuing negotiations on market access for non-agricultural products aimed at reducing or, as appropriate, eliminating tariffs, including the reduction or elimination of tariff peaks, high tariffs, and tariff escalation, as well as non-tariff barriers, in particular on products of export interest to developing countries; and implementing other relevant areas of the World Trade Organization work programme; (c) In line with the Johannesburg Plan of Implementation, 2 mutual supportiveness between the multilateral trading system and the multilateral environmental agreements, consistent with sustainable development goals, should be promoted in support of the work programme agreed through the World Trade Organization, while recognizing the importance of maintaining the integrity of both sets of instruments; (d) In the light of the process of multilateral trade liberalization, which has led to the diminution of differentials accorded by preferred trade regimes, there is a need to take measures, as appropriate and consistent with international obligations, to address that diminution, in particular by strengthening technical assistance, by continuing to provide financial assistance to commodity-dependent developing countries and by addressing supply-side constraints faced by these countries, in order to improve the competitiveness of their commodity sectors and to overcome difficulties encountered in their diversification programmes; (e) Timely and effective financial cooperation should be maintained and further pursued to facilitate the management by commodity-dependent developing countries, especially those in Africa and the least developed countries, as well as small island developing States and landlocked developing countries, of excessive fluctuations in commodity export earnings, and in this regard stresses that it is important to pursue diversification as part of a long-term solution; (f) Strengthening technical cooperation in the areas of transfer of new technologies and know-how in production processes and training for technical, managerial and commercial staff in developing countries is of paramount importance for quality improvements in the commodity sector; (g) Expansion of South-South trade and investment in commodities enhances complementarities and offers opportunities for intersectoral linkages within and among exporting countries; (h) There is a need to promote, expand and intensify research and development, to provide infrastructure, enterprise development, technology and support services and to encourage investment, including joint ventures in developing countries engaged in the commodity and commodity-processing sectors; 8. Underlines the need to strengthen the Common Fund for Commodities, and encourages it, in cooperation with the International Trade Centre, the United Nations Conference on Trade and Development and other relevant bodies, to continue to strengthen the activities covered by its Second Account in developing countries with its supply chain concept of improving access to markets and reliability of supply, enhancing diversification and value addition, improving competitiveness of commodities, strengthening the market chain, improving market structures, broadening the export base and ensuring the effective participation of all stakeholders; 9. Invites the United Nations Conference on Trade and Development, within its mandate, to provide assistance to developing countries in promoting commodity diversification and to include issues related to commodities in the provision of 4