1 . MEASURES ADOPTED BY INSTITUTIONS - INDIVIDUAL DECISIONS UNDER THE ECSC TREATY - REQUIREMENTS AS TO FORM - INFRINGEMENT - PENALTIES - LIMITS ( ECSC TREATY , ART . 18 ; DECISION 22/60 OF THE HIGH AUTHORITY ) 2 . MEASURES ADOPTED BY INSTITUTIONS - DUTY TO STATE REASONS - EXTENT - DECISION FIXING PRODUCTION QUOTAS ( ECSC TREATY , ART . 15 ) 3 . ECSC - PRODUCTION - SYSTEM OF PRODUCTION QUOTAS FOR STEEL - REFERENCE PRODUCTION - CONDITIONS FOR INCREASE - NEW PRODUCTION CAPACITIES - CRITERIA OF ASSESSMENT ( GENERAL DECISION 2794/80 , ART . 4 , POINT 4 ) 4 . ECSC - PRODUCTION - SYSTEM OF PRODUCTION QUOTAS FOR STEEL - REFERENCE PRODUCTION - CONDITIONS FOR INCREASE - NEW PRODUCTION CAPACITIES AND RESTRUCTURING OF UNDERTAKINGS - CUMULATIVE CONSIDERATION - NOT PERMISSIBLE ( GENERAL DECISION 2794/80 , ART . 4 , POINTS 4 AND 5 ) 5 . OBJECTION OF ILLEGALITY - PROVISIONS OF GENERAL DECISIONS THE ILLEGALITY OF WHICH MAY BE PLEADED - PROVISIONS CONSTITUTING THE BASIS OF THE CONTESTED INDIVIDUAL DECISION ( ECSC TREATY , ART . 36 , THIRD PARAGRAPH )