1 . QUANTITATIVE RESTRICTIONS - MEASURES HAVING EQUIVALENT EFFECT - DESIGNATIONS OF ORIGIN - NATIONAL MEASURES OF GUARANTEE - CONDITIONS FOR ACCEPTABILITY - PROPORTIONALITY - EXAMINATION OF CERTIFICATES OF ORIGIN ( EEC TREATY , ARTS . 30 AND 36 ) 2 . QUANTITATIVE RESTRICTIONS - MEASURES HAVING EQUIVALENT EFFECT - DESIGNATIONS OF ORIGIN - NATIONAL MEASURES OF GUARANTEE - CONDITIONS FOR ACCEPTABILITY - PROPORTIONALITY - LIMITS ( EEC TREATY , ART . 30 ) 3 . QUANTITATIVE RESTRICTIONS - MEASURES HAVING EQUIVALENT EFFECT - DESIGNATIONS OF ORIGIN - NATIONAL MEASURES OF GUARANTEE - DUTIES OF MEMBER STATE CONCERNED ( EEC TREATY , ARTS . 30 AND 36 )