Tariff classification of integral machine parts must follow the specific heading, not the residuary entry, when function is machine-dependent.
Tariff classification of a motor vibrator with actuators depended on whether it had an independent functional identity or operated only as an integral part of pulp-making machinery. Because the item was mounted on the chute, worked only with the defibrator, and regulated the flow of wood chips as part of the system, the specific heading for parts of pulp-making machinery prevailed over the residuary heading for machinery with individual functions. The item was therefore classifiable with the main machine, and the residuary entry could not apply.
Issues: Whether the motor vibrator with actuators was classifiable under the residuary heading for machinery having individual functions or as a part of the pulp-making machinery under the specific heading applicable to machinery for making pulp of fibrous cellulosic material.
Analysis: The item was mounted on the chute and worked only in conjunction with the defibrator to regulate the flow of wood chips at a predetermined rate. Its function was not independent of the pulp-making system, and it was essential for the proper functioning of the machinery as a whole. In tariff classification, the specific heading for parts of the relevant machine had to prevail over the residuary heading, particularly where the goods were designed to work with a particular machine and did not have an independent functional identity. The residuary entry could not be applied when the goods were properly covered by the specific heading and the principal function test under Chapter 84 supported classification with the main machinery.
Conclusion: The motor vibrator with actuators was correctly classified as a part of the pulp-making machinery under Heading 8439.91 and not under the residuary Heading 8479.89.
Final Conclusion: The department's appeal failed because the disputed item was held to be an essential component of the pulp-making system and therefore classifiable with the main machinery rather than as a separate machine of general use.
Ratio Decidendi: Where an item functions only in conjunction with a specific machine and forms an integral part of that machine, classification must be under the specific heading for the machine or its parts, not under a residuary tariff entry.
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