1 . COMMON CUSTOMS TARIFF - VALUE FOR CUSTOMS PURPOSES - NORMAL PRICE OF GOODS - DETERMINATION - INVOICE PRICE - REDUCTION BY NATIONAL AUTHORITIES - NOT PERMISSIBLE - DUTY TO ACCEPT VALUE FOR CUSTOMS PURPOSES FOR PURPOSES OTHER THAN THOSE OF CUSTOMS - ABSENCE ( REGULATION NO 803/68 OF THE COUNCIL ) 2 . COMMON CUSTOMS TARIFF - VALUE FOR CUSTOMS PURPOSES - NORMAL PRICE OF GOODS - DETERMINATION - REFERENCE TO THE PRICE DECLARED BY THE SELLER ' S FORWARDING AGENT , WHICH IS LESS THAN THE PRICE INVOICED AND PAID - NOT PERMISSIBLE ( REGULATION NO 803/68 OF THE COUNCIL )