Case T-464/09: Judgment of the General Court of 12 May 2011 — Commission v New Acoustic Music and Hildibrandsdottir (Arbitration clause — Contract for financial assistance concluded under the ‘Culture 2000’ Framework Programme — Implementation of the action entitled ‘European Music Roadwork’ — Non-performance of the contract — Repayment of part of the amounts advanced — Partial inadmissibility of the action — Procedure by default — Legal aid)