Judgment of the Court (Fifth Chamber) of 6 June 2002 in Case C-360/00 (Reference for a preliminary ruling from the Bundesgerichtshof): Land Hessen v G. Ricordi & Co. Bühnen- und Musikverlag GmbH (Term of copyright protection — Principle of non-discrimination on grounds of nationality — Applicability to copyright which arose prior to the entry into force of the EEC Treaty)