1. Commission - Composition - Leave of absence of one of its Members - No effect on the legality of decisions adopted by the college in accordance with its rules of procedure (Art. 215, fourth para., EC) 2. Commission - Composition - Independence of Members of the Commission in the exercise of their functions - Election to the European Parliament of a Member who resigns - No effect (Arts 213(2), first and second subparas, EC, 215 EC and 219, second and third paras, EC) 3. State aid - Prohibition - Derogations - Aid to shipbuilding - Directive 90/684 - Aid for East German shipyards - Reduction of construction capacity - Meaning of capacity - Commission's power of appraisal - Decision declaring authorised aid to be incompatible with the common market on the basis of criteria different from those in the decision authorising that aid - Capacity limit treated as a limit on actual production - Manifest error of appraisal (Council Directives 90/684 and 92/68)