FREE MOVEMENT OF GOODS - CUSTOMS DUTIES ON EXPORTATION - CHARGES HAVING EQUIVALENT EFFECT - CONCEPT - PHYTOSANITARY INSPECTIONS - INTERNATIONAL PLANT PROTECTION CONVENTION - FREE IMPORTATION INTO THE COUNTRY OF DESTINATION - MULTINATIONAL SYSTEM OF INSPECTIONS - ABSENCE OF OBSTACLES TO TRADE - FEES - ACTUAL COST OF INSPECTIONS - ADMISSIBILITY - PROCEDURE FOR FINANCING INSPECTIONS - STANDARDIZATION - POWERS OF THE COMMUNITY INSTITUTIONS ( EEC TREATY , ARTICLES 12 , 16 AND 36 )