1 . FREE MOVEMENT OF GOODS - GOODS - CONCEPT - MEANS OF PAYMENT - GOLD AND SILVER COINS - DESIGNATION ( EEC TREATY , ARTS . 30 TO 37 ) 2 . FREE MOVEMENT OF GOODS - DEROGATIONS - GROUNDS OF PUBLIC POLICY - SILVER COINS WHICH ARE NO LONGER LEGAL TENDER - BAN ON EXPORT - LAWFULNESS ( EEC TREATY , ART . 36 )