The fifteenth session of the Conference reaffirms its commitment to an open, transparent, inclusive, non-discriminatory, rules-based, multilateral trading system under the World Trade Organization. Trade liberalization, including through accession to the World Trade Organization, and combating protectionism can play a significant role in integrating developing countries and countries with economies in transition positively into the multilateral trading system, as embodied by the World Trade Organization, especially when accompanied by balanced, appropriate supporting and sustainable policies at all levels, including in the context of national policy objectives. The World Trade Organization is encouraged to maintain development at its centre, continue to facilitate the removal of trade barriers and enhance the participation of all developing countries in international trade, including with provisions for special and differential treatment for developing countries, in particular least developed countries, in accordance with World Trade Organization agreements, with a view to ensuring a level playing field for all. Acceding countries, particularly the least developed countries, also need technical assistance prior to, during and in the follow-up to the accession process.