category of goods for the six-month period preceding a complaint from an affected Member State concerning diversion of trade, and for an average of two comparable six-month periods during the twenty-four (24) months preceding the first importation of goods under the barter agreement or compensatory exchange agreement. 3. The Secretary-General shall refer the matter to the Council for consideration and submission to the Assembly for decision. Article 42 Trade Promotion 1. In order to attain the objectives of the Community set out in sub-paragraph 2 (m) Article 4 of this Treaty, Member States agree to undertake the trade promotion activities stated below in the following areas: (a) (b) (c) Intra-Community Trade (i) Promote the use of the Community's local materials, intermediate goods and inputs, as well as finished products originating within the Community; (ii) Adopt the “All-Africa Trade Fair of the OAU”, as an instrument of the Community trade promotion; (iii) Participate in the periodic fairs organised under the auspices of the “All-Africa Trade Fair of the OAU”, sectoral trade fairs, regional trade fairs and other trade promotion activities of the Community; (iv) Develop an intra-community trade information network, linking the computerised trade information systems of existing and future regional economic communities and individual Member States of the Community; and (v) With the assistance of the Secretariat, study the supply and demand patterns in Member States and disseminate the findings thereon within the Community. South-South Trade (i) Promote the diversification of Africa's markets, and the marketing of Community products; (ii) Participate in extra-community trade fairs, in particular, within the context of South-South Co-operation; and (iii) Participate in extra-community trade and investment fora. North-South Trade 30