Case T-64/08: Judgment of the General Court of 1 July 2010 — Nuova Terni Industrie Chimiche v Commission (State aid — Compensation for expropriation on grounds of public interest — Temporal extension of a preferential tariff for the supply of electricity — Decision declaring the aid incompatible with the common market and ordering its recovery — Concept of advantage — Principle of the protection of legitimate expectations — Aid measure put into effect)