1. For the purposes of this Convention, the term 'discrimination' includes any distinction, exclusion, limitation or preference which, being based on race, colour, sex, language, religion, political or other opinion, national or social origin, economic condition or birth, has the purpose or effect of nullifying or impairing equality of treatment in education and in particular: (a) Of depriving any person or group of persons of access to education of any type or at any level; (b) Of limiting any person or group of persons to education of an inferior standard; (c) Subject to the provisions of Article 2 of this Convention, of establishing or maintaining separate educational systems or institutions for persons or groups of persons; or (d) Of inflicting on any person or group of persons conditions which are incompatible with the dignity of man. 2. For the purposes of this Convention, the term 'education' refers to all types and levels of education, and includes access to education, the standard and quality of education, and the conditions under which it is given.