Judgment of the Court of 30 September 2003 in Case C-47/02 (Reference for a preliminary ruling from the Schleswig-Holsteinisches Oberverwaltungsgericht): Albert Anker, Klaas Ras, Albertus Snoek v Bundesrepublik Deutschland () (Freedom of movement for workers — Article 39(4) EC — Employment in the public service — Masters of fishing vessels — Conferment of powers of public authority on board — Posts reserved for nationals of the flag State)