1 . PROCEDURE - DECISION REPLACING CONTESTED DECISION WHILE ACTION IN PROGRESS - NEW FACTOR - AMENDMENT OF PLEADINGS 2 . MEASURES ADOPTED BY THE INSTITUTIONS - WITHDRAWAL OF UNLAWFUL MEASURES - CONDITIONS 3 . ECSC - PRODUCTION - QUOTA SYSTEM - CONCOMITANT ADOPTION OF MEASURES CONCERNING IMPORTS FROM NON-MEMBER COUNTRIES - COMMISSION ' S POWER OF APPRAISAL ( ECSC TREATY , ART . 58 ( 1 )) 4 . MEASURES ADOPTED BY THE INSTITUTIONS - DECISIONS - DUTY TO STATE REASONS - LIMITS 5 . ECSC - PRODUCTION - QUOTA SYSTEM - ESTABLISHED ON AN EQUITABLE BASIS - COMMISSION ' S FREEDOM OF CHOICE - TAKING INTO ACCOUNT OF UNDERTAKINGS ' ACTUAL PRODUCTION - PERMISSIBILITY - PRODUCTION CAPACITY OF UNDERTAKINGS - EXCLUSION JUSTIFIED 6 . ECSC - PRODUCTION - QUOTA SYSTEM - PURPOSE - TO COMPENSATE FOR DISTORTIONS OF COMPETITION ATTRIBUTABLE TO STATE SUBSIDIES - NO ( ECSC TREATY , ART . 58 ) 7 . ECSC - PRODUCTION - SYSTEM OF PRODUCTION QUOTAS FOR STEEL - ESTABLISHED ON AN EQUITABLE BASIS - CHOICE OF A PARTICULAR PERIOD OF REFERENCE - DISCRIMINATION AGAINST CERTAIN UNDERTAKINGS - NONE - APPLICATION OF RELIEF CLAUSE IN CASES OF HARDSHIP ( ECSC TREATY , ART . 58 ; DECISION NO 2794/80 , ART . 14 ) 8 . ECSC - PRODUCTION - SYSTEM OF PRODUCTION QUOTAS FOR STEEL - ESTABLISHED ON AN EQUITABLE BASIS - TAKING INTO ACCOUNT OF UNDERTAKINGS ' REFERENCE PRODUCTION - GROUNDS FOR ADJUSTMENT - PARTICIPATION IN A VOLUNTARY DELIVERY PROGRAMME - NOT A SANCTION AGAINST OTHER UNDERTAKINGS ( DECISION NO 2794/80 , ART . 4 ( 3 )) 9 . ECSC - PRODUCTION - SYSTEM OF PRODUCTION QUOTAS FOR STEEL - ESTABLISHED ON AN EQUITABLE BASIS - TAKING INTO ACCOUNT OF UNDERTAKINGS ' REFERENCE PRODUCTION - GROUNDS FOR ADJUSTMENT - PARTICIPATION IN A VOLUNTARY DELIVERY PROGRAMME - PRINCIPLE THAT LEGITIMATE EXPECTATIONS MUST BE PROTECTED - BREACH - NONE ( DECISION NO 2794/80 , ART . 4 ( 3 ))