ECSC - PRODUCTION - STEEL PRODUCTION QUOTA SYSTEM - ALLOCATION OF ADDITIONAL QUOTAS - CONDITIONS - REDUCTIONS IN PRODUCTION CAPACITY EFFECTED AFTER THE REFERENCE DATE IN ACCORDANCE WITH A RESTRUCTURING PLAN OR AS REQUIRED BY THE COMMISSION IN ITS DECISIONS CONCERNING AID TO THE STEEL INDUSTRY - REFERENCE CRITERIA - ARBITRARY OR DISCRIMINATORY NATURE - NONE ( ECSC TREATY , ART . 58 ; DECISION NO 2177/83 , ART . 14 B , AND DECISION NO 234/84 , ART . 14 B )