Additional customs duty on computers clarified: separate CPUs and assembled computer sets now attract distinct ad valorem duties. Amendment revises additional customs duty: CPUs imported separately attract a 6% ad valorem duty, while computers of heading 8471 (including a CPU with monitor, mouse and keyboard cleared together as a set) attract a 7% ad valorem duty; separately imported input/output devices and accessories are excluded from the computer entry. The prior Explanation in the principal Rules is omitted and the rules take effect on publication.