Judgment of the Court of 10 July 2003 in Case C-165/01 (Reference for a preliminary ruling from the Oberster Gerichtshof): Betriebsrat der Vertretung der Europäischen Kommission in Österreich v European Communities, Commission of the European Communities (Staff Regulations of Officials of the European Communities — Conditions of Employment of Other Servants — Local staff — Representation of the Commission in Austria — Applicability of national legislation concerning the representation of workers and defence of their interests)