++++ 1. Actions for annulment ° Natural or legal persons ° Measures of direct and individual concern to them ° Commission decision addressed to a Member State finding a State aid compatible with the common market ° Action by the parties concerned within the meaning of Article 93(2) of the Treaty ° Admissibility (EEC Treaty, Arts 93(2) and (3) and Art. 173, second para.) 2. State aid ° Proposed aid ° Examination by the Commission ° Preliminary stage and stage at which the parties have an opportunity to state their case ° Compatibility of aid with the common market ° Difficulties involved in making an assessment ° Obligation on the part of the Commission to initiate the procedure in which the parties have an opportunity to state their case (EEC Treaty, Arts 93(2) and (3))