By using an "anti-grey market" copyright statute, the holder of the copyrighted work (the company that designed the label) can prevent the importation of authentic products produced for a cheaper foreign market and keep prices to U.S. retailers artificially high. It can also impose liability on the retailer that acquires these perfectly good "grey market" goods.
Take the example of a bottle of L'anza brand shampoo. The manufacturer in California sells the shampoo for say $5 a bottle in the U.S., but sells the same shampoo overseas for only $3 a bottle. Unless it violates your distribution agreement with that manufacturer, it is perfectly legal for a retailer to buy the genuine shampoo overseas, import it back to the U.S., and then resell it for a profit. But add a label to the bottle of shampoo, and the situation may change.
