Page 28 (b) harmonization of the programming of national trade fairs and similar events; (c) establishment of an intra-Community trade information network; (d) study of supply and demand patterns in Member States and dissemination of the findings thereon within the Community; (e) promotion of the diversification of West African markets, and the marketing of Community products; (f) promotion of better terms of trade for West African commodities and improvement of access to international markets for Community products; and (g) participation, where appropriate, in international negotiations within the framework of GATT and UNCTAD and other trade-related negotiating fora. Article 51 Money, Finance and Payments In order to promote monetary and financial integration, and facilitate intra-Community trade in goods and services and the realization of the Community's objective of establishing a monetary union, Member States undertake to: (a) study monetary and financial developments in the region; (b) harmonize their monetary, financial and payments policies; (c) facilitate the liberalization of intra-regional payments transactions and, as an interim measure, ensure limited convertibility of currencies; (d) promote the role of commercial banks in intra-community trade financing; (e) improve the multilateral system for clearing of payments transactions between Member States, and introduce a credit and guarantee fund mechanism; (f) take necessary measures to promote the activities of the West Africa Monetary Agency in order to ensure convertibility of currencies and creation of a single currency zone; (g) establish a Community Central Bank and a common currency zone. Article 52 Committee of West African Central Banks 1. There is hereby established a Committee of West African Central banks comprising the Governors of Central Banks of Member States. This Committee shall, in accordance with the provisions of this Treaty, prepare its own rules of procedure.