Exemption for parts used in tractor manufacture allows coverage of components classified outside the vehicle parts chapter, subject to conditions. Notification-based exemptions cover parts from any chapter used within the factory of production for manufacture of goods of heading 8701, even where a Section exclusion prevents their classification as parts under Chapter 87; such goods retain their original chapter classification (for example, internal combustion engines) but remain eligible for exemption subject to the other conditions and documentary requirements of the notifications.