Article 17(1) Knowledge and its teaching are free. (2) Every national who has furnished in legally acceptable manner proof of his qualification has the right to found establishments for instruction and education. (3) Instruction at home is subject to no such restriction. (4) The Church or religious society concerned shall see to religious instruction in schools. (5) The right to supreme direction and supervision over the whole instructional and educational system lies with the state. Article 17aArtistic creativity as well as the dissemination of art and its teaching shall be free.Article 18Everyone has the right to choose his vocation and to train for it how and where he wishes.