1 . COMMUNITY LAW - PRINCIPLES - EQUALITY OF TREATMENT - DISCRIMINATION ON THE GROUNDS OF NATIONALITY - PROHIBITION - SCOPE ( EEC TREATY , ART . 7 ) 2 . FREE MOVEMENT OF GOODS - QUANTITATIVE RESTRICTIONS ON EXPORTS - MEASURES HAVING EQUIVALENT EFFECT - CONCEPT - RULES BASED ON OBJECTIVE CRITERIA AND NOT DISTINGUISHING BETWEEN DOMESTIC TRADE AND EXPORT TRADE - EXCLUSION ( EEC TREATY , ART . 34 ) 3 . FREE MOVEMENT OF GOODS - QUANTITATIVE RESTRICTIONS - MEASURES HAVING EQUIVALENT EFFECT - RULES PROHIBITING NIGHTWORK IN BAKERIES - PERMISSIBILITY ( EEC TREATY , ARTS 30 AND 34 )