即使美国把3％规则适用于从世界其他地方进口的产品税则编码也无济于事，因为那样美国就可以将大约300种税则产品从免税和免配额待遇中排除。
The situation is no better if the 3% rule applies to the tariff lines that the US imports from the rest of the world (rather than to the lines individual poor countries export to the US), for then the US can exclude roughly 300 tariff lines from duty-free and quota-free treatment.