PH3 Page 6 (i) the liberalization of trade by the abolition, among Member States, of customs duties levied on imports and exports, and the abolition among Member States, of non-tariff barriers in order to establish a free trade area at the Community level; (ii) the adoption of a common external tariff and, a common trade policy vis-à-vis third countries; (iii) the removal, between Member States, of obstacles to the free movement of persons, goods, service and capital, and to the right of residence and establishment. (e) the establishment of an economic union through the adoption of common policies in the economic, financial social and cultural sectors, and the creation of a monetary union; (f) the promotion of joint ventures by private sectors enterprises and other economic operators, in particular through the adoption of a regional agreement on cross-border investments; (g) the adoption of measures for the integration of the private sectors, particularly the creation of an enabling environment to promote small and medium scale enterprises; (h) the establishment of an enabling legal environment; (i) the harmonization of national investment codes leading to the adoption of a single Community investment code; (j) the harmonization of standards and measures; (k) the promotion of balanced development of the region, paying attention to the special problems of each Member State particularly those of land-locked and small island Member States; (l) the encouragement and strengthening of relations and the promotion of the flow of information particularly among rural populations, women and youth organizations and socio professional organizations such as associations of the media, business men and women, workers, and trade unions; (m) the adoption of a Community population policy which takes into account the need for a balance between demographic factors and socio economic development; (n) the establishment of a fund for cooperation, compensation and development; and (o) any other activity that Member States may decide to undertake jointly with a view to attaining Community objectives. Article 4 Fundamental Principles The High Contracting Parties, in pursuit of the objectives stated in Article 3 of this Treaty, solemnly affirm and declare their adherence to the following principles: Page 7 equality and inter-dependence of Member States; (p) solidarity and collective self-reliance; (q) inter-State cooperation, harmonization of policies and integration of programmes; (r) non-aggression between Member States; (s) maintenance of regional peace, stability and security through the promotion and strengthening of good neighbourliness; (t) peaceful settlement of disputes among Member States, active cooperation between neighbouring countries and promotion of a peaceful environment as a prerequisite for economic development; (u) recognition promotion and protection of human and peoples' rights in accordance with the provisions of the African Charter on Human and Peoples' Rights;