Judgment of the Court (Fifth Chamber) of 25 October 2001 in Case C-475/99 (reference for a preliminary ruling from the Oberverwaltungsgericht Rheinland-Pfalz): Firma Ambulanz Glöckner v Landkreis Südwestpfalz (Articles 85, 86 and 90 of the EC Treaty (now Articles 81 EC, 82 EC and 86 EC) — Transport of sick or injured persons by ambulance — Special or exclusive rights — Restriction of competition — Public interest task — Justification — Effect on trade between Member States)