Case T-60/03: Judgment of the Court of First Instance of 18 October 2005 — Regione Siciliana v Commission (Action for annulment — Admissibility — Fourth paragraph of Article 230 EC — Natural or legal persons — Act of direct concern to them — European Regional Development Fund (ERDF) — Commission's decision cancelling and requiring repayment of financial assistance — Article 24 of Regulation (EEC) No 4253/88 — Manifest error of assessment)