++++ 1 . ECSC TREATY - ECONOMIC AND SOCIAL PROVISIONS - PRICES - DISCRIMINATORY PRACTICES - COMPARABLE TRANSACTIONS - CONCEPT ( ECSC TREATY, ARTICLE 60(1 )) 2 . ECSC TREATY - ECONOMIC AND SOCIAL PROVISIONS - PRICES - DISCRIMINATORY PRACTICES - IDENTICAL FINAL PRICE APPLIED TO COMPARABLE TRANSACTIONS - POSSIBILITY OF DISCRIMINATION NOT EXCLUDED BY THIS FACT ALONE ( ECSC TREATY, ARTICLE 60(1 )) 3 . ECSC TREATY - ECONOMIC AND SOCIAL PROVISIONS - DISSIMILAR PRICES AND CONDITIONS OF SALE - TRANSACTIONS WHICH ARE NOT COMPARABLE - BURDEN OF PROOF ON THE SELLER 4 . ECSC TREATY - ECONOMIC AND SOCIAL PROVISIONS - PRICES - PUBLICITY - RULES ( ECSC TREATY, ARTICLE 60(2 )) 5 . MEASURES ADOPTED BY AN INSTITUTION - DECISIONS OF THE HIGH AUTHORITY - STATEMENT OF REASONS ( ECSC TREATY, ARTICLE 15 )