CHAPTER XIX RELATIONS BETWEEN THE COMMUNITY AND REGIONAL ECONOMIC COMMUNITIES, REGIONAL CONTINENTAL ORGANISATIONS AND OTHER SOCIO-ECONOMIC ORGANISATIONS AND ASSOCIATIONS Article 88 Relations between the Community and Regional Economic Communities 1. The Community shall be established mainly through the co-ordination, harmonisation and progressive integration of the activities of regional economic communities. 2. Member States undertake to promote the co-ordination and harmonisation of the integration activities of regional economic communities of which they are members with the activities of the Community, it being understood that the establishment of the latter is the final objective towards which the activities of existing and future regional economic communities shall be geared. 3. To this end, the Community shall be entrusted with the co-ordination, harmonisation and evaluation of the activities of existing and future regional economic communities. 4. Member States undertake, through their respective regional economic communities, to coordinate and harmonize the activities of their sub-regional organisations, with a view to rationalising the integration process at the level of each region. Article 89 Relations between the Community and African Continental Organisations The Community shall closely cooperate with African continental organisations including, in particular, the African development Bank and African Centre for Monetary Studies in order to ensure the attainment of regional and continental integration objectives. It may conclude co-operation agreements with these Organisations. Article 90 58