ECOWAS REVISED TREATY f) the promotion of joint ventures by private sector 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 harmonisation of national investment codes leading to the adoption of a single Community investment code; j) the harmonisation 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 landlocked and small island Member States; 1) the encouragement and strengthening of relationsand the promotionof the flowof information particularly among ruralpopulations, womenandyouth organisations and socio-professional organisations such as associations of the media, business men and women, workers, and trade unions; m) n) the adoption of a Community population policy which takes into account the need for a balance between demographic factors and socio-economic development; the establishment of a fund for co-operation, 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: a) equality and inter-dependence of Member States; b) solidarity and collective self-reliance; c) inter-State co-operation, harmonisation of policiesand integrationof programmes;