commiss regul eec decemb determin oper event calcul levi refund rice sector commiss european commun regard treati establish european econom commun regard council regul eec june unit account convers rate appli purpos common agricultur polici articl thereof accord commiss regul eec convers rate determin monetari coeffici calcul appli similar monetari compensatori amount calcul accord articl regul eec agricultur convers rate alter alter appli amount respect oper event occur alter effect accord articl regul oper event mean amount charg grant trade complet custom import export formal result amount levi refund fix advanc vari nation currenc advanc fix levi refund constitut risk oper consequ oper event defin date accept applic advanc fix levi refund purpos appli convers rate calcul amount nation currenc measur provid regul accord opinion manag committe cereal adopt regul articl oper event convers nation currenc amount levi refund applic rice sector case advanc fix amount dai applic advanc fix lodg case advanc fix tender procedur close date submiss tender articl regul enter forc dai public offici journal european commun regul bind entireti directli applic member state brussel decemb commiss fran andriessen vice presid oj oj