9 sources of African art. Hence, specialist training should be provided in national, regional and sub-regional training centres. Chapter V – Life-long Education Article 15 African governments will have to pay special attention to the growing importance of life-long education in modern societies. Article 16 African governments should take steps to organize continuous training in a rational way and to establish an appropriate system of education which satisfied the specific needs of their people. PART V THE USE OF AFRICAN LANGUAGES Article 17 The African States recognize the imperative need to develop African languages which will ensure their cultural advancement and accelerate their economic and social development and to this end will endeavour to formulate a national policy in regard to languages. Article 18 The African States should prepare and implement the reforms necessary for the introduction of African languages into education. To this end each state may choose one or more languages. Article 19 The introduction of African languages at all levels of education should have to go hand-in-hand with literacy work among the people at large.