((Action for annulment – ECSC – Article 4(c) of the ECSC Treaty – Commission Decision No 2496/96/ECSC (Sixth Steel Aid Code) – Payments to compensate employees for a reduction in working hours under a collective agreement – Meaning of aid – Beneficiary of the aid – Costs payable by the undertaking – Economic advantage – Obligation to state reasons – Failure by the Commission to comply with the time-limit – Article 95 of the ECSC Treaty))