++++ 1 . CARTELS - PRICES - POWER TO FIX PRICES AND POWER TO DETERMINE PRICES - PERMISSIBILITY OF THIS DISTINCTION - CONCEPTS ( ECSC TREATY, ARTICLE 65 ) 2 . COMMON MARKET FOR COAL AND STEEL - SYSTEM OF COMPETITION - IMPERFECT COMPETITION - CONDITIONAL ADMISSIBILITY ( ECSC TREATY, SECOND PARAGRAPH OF ARTICLE 2, ARTICLE 65 ( 2 ), ARTICLE 66 ( 2 )) 3 . CARTELS - AUTHORIZATION BY THE HIGH AUTHORITY - LIMITS - CONTROL OF MARKETING - CONCEPT ( ECSC TREATY, ARTICLE 65 ( 2 ) ( C )) 4 . CARTELS - AUTHORIZATION BY THE HIGH AUTHORITY - LIMITS - POWER TO DETERMINE PRICES WITHIN THE SCHEME OF THE TREATY - CONDITIONAL ADMISSIBILITY ( ECSC TREATY, ARTICLE 65 ( 2 ) ( C )) 5 . CARTELS - AUTHORIZATION BY THE HIGH AUTHORITY - LIMITS - POWER APPLICABLE TO A SUBSTANTIAL PART OF CERTAIN PRODUCTS WITHIN THE COMMON MARKET - CONCEPT ( ECSC TREATY, ARTICLES 2, 3, 4, 5, 65 ( 2 ) ( C ) )