Judgment of the Court (Sixth Chamber) of 16 March 2000 in Case C-329/97 (reference for a preliminary ruling from the Bundesverwaltungsgericht): Sezgin Ergat v Stadt Ulm (EEC-Turkey Association Agreement — Free movement of workers — First paragraph of Article 7 of Decision No 1/80 of the Association Council — Member of a Turkish worker's family — Extension of residence permit — Definition of legal residence — Application for extension of a temporary residence permit lodged after its expiry)