1 . COMPETITION - COMMUNITY RULES - OBLIGATIONS OF MEMBER STATES ( EEC TREATY , ART . 5 , SECOND PARA , AND ART . 85 ( 1 )) 2 . COMPETITION - COMMUNITY RULES - NATIONAL LEGISLATION ON THE PRICE OF BOOKS - COMPATIBILITY - CONDITIONS ( EEC TREATY , ART . 3 ( F ), ART . 5 , SECOND PARA , AND ART . 85 ) 3 . FREE MOVEMENT OF GOODS - QUANTITATIVE RESTRICTIONS - MEASURES EQUIVALENT IN EFFECT - CONCEPT - LEGISLATION DISCRIMINATING AGAINST IMPORTED PRODUCTS ( EEC TREATY , ART . 30 ) 4 . FREE MOVEMENT OF GOODS - DEROGATIONS - ARTICLE 36 OF THE TREATY - STRICT INTERPRETATION - CONSUMER PROTECTION - PROTECTION OF CREATIVITY AND CULTURAL DIVERSITY IN THE PUBLISHING FIELD - EXCLUSION ( EEC TREATY , ART . 36 ) 5 . FREE MOVEMENT OF GOODS - QUANTITATIVE RESTRICTIONS - MEASURES EQUIVALENT IN EFFECT - LEGISLATION ON THE PRICE OF BOOKS - PROHIBITION - CONDITIONS ( EEC TREATY , ART . 30 )