Accessory
Accessory has the meaning which it has under normal commercial usage. An accessory, whether part of an instrument or an attachment to an instrument, adds to the capability of an instrument. An accessory for which duty-free entry is sought under subheading 9810.00.60, HTSUS shall be the subject of a separate application when it is not an accompanying accessory. The existing instrument, for which the accessory is being purchased, may be domestic or, if foreign, it need not have entered duty free under subheading 9810.00.60, HTSUS.