The Special Rapporteur recalls that the normative bases of lifelong learning exist in international human rights treaties. The Convention against Discrimination in Education (1960) lays down the obligation of States with regard to continuing education. The International Covenant on Economic, Social and Cultural Rights, adopted in 1966, includes similar provisions. According to article 13 (2) (d) of the Covenant, individuals "who have not received or completed the whole period of their primary education" have a right to fundamental education, or basic education as defined in the World Declaration on Education for All (1990). The enjoyment of the right to fundamental education is not limited by age or gender; it extends to children, young people and adults, including older persons. Fundamental education, therefore, is an integral component of adult education and lifelong learning. Because fundamental education is a right of all age groups, curricula and delivery systems suitable for students of all ages must be devised.