Customs exemption for specified motors reduces applicable import duty where duty exceeds prescribed rates. The Government exempts specified imported motors and parts from that portion of customs duty in excess of amounts calculated at the rates set out in the notification's Table. The Table identifies stepper motors for clocks, DC micromotors within stated voltage and output limits (excluding stepper motors), and parts of stepper motors, and prescribes ad valorem treatment for stepper motors and parts and a per piece duty measure for the micromotors for the purpose of determining the exemptable duty portion.