Compliance FAQs: Packaging and Labeling in the US | NIST Sep 11, 2017 · There are many regulations, depending on the product, with which a product’s label or markings must be in compliance before being sold in the United States. Labeling requirements related to legal metrology (i.e., products and commodities sold in package form by weight, measure or count) must comply with The Fair Packaging and Labeling Act ...