Federal Fair Packaging and Labeling Act. The law also calls on industry to try to reduce the number of package sizes and make labels more useful. Ask them how much more time it takes to hand enter the code. For example, a 50 pound bag of dog food at Wal-Mart used to be all but impossible to scan. Now, the UPC tag is a sticker that peels off at checkout.
Convenient packages are easier to use, making purchase decisions easier for the customer as well.