TITJUR Güzeli Opinion of Mr Advocate General Geelhoed delivered on 23 March 2006. # Hasan Güzeli v Oberbürgermeister der Stadt Aachen. # Reference for a preliminary ruling: Verwaltungsgericht Aachen - Germany. # Reference for a preliminary ruling - EEC-Turkey Association - Freedom of movement for workers - Article 10(1) of Decision No 1/80 of the Association Council - Refusal to extend a Turkish worker's residence permit. # Case C-4/05.