Judgment of the Court (Sixth Chamber) of 3 June 2021.#BY and Others v Stadt Duisburg.#Request for a preliminary ruling from the Verwaltungsgericht Düsseldorf.#Reference for a preliminary ruling – EEC-Turkey Association Agreement – Decision No 1/80 – Articles 6 and 7 – Legal employment – Article 9 – Access to education for children of a Turkish worker – Right of residence – Refusal.#Case C-194/20.