Classification dispute regarding drilling rigs mounted on truck...

Classification dispute regarding drilling rigs mounted on truck chassis/crawler - whether under tariff heading 84.30 or 87.05 during 1986-1988. Supreme Court settled classification under 87.05 in appellant's own case. Once classification settled, appellant became eligible for exemption under Notification 242/86-CE applicable to Chapter 87.05 goods, even though initially not claimed. Tribunal followed precedent allowing exemption claim at later stage. Condition of notification requiring duty payment on chassis/equipment used deemed complied as all market goods presumed duty paid. Chassis and equipment for special purpose vehicles considered deemed duty paid. Impugned order set aside, appeal allowed.