Which of the following is true about federal rules for food product date labeling in the United States?

All packaged foods sold nationwide must display standardized federal sell-by, best-by, and use-by dates that are enforced uniformly by FDA, with no state-level variation permitted.

The USDA mandates date labels for all refrigerated dairy products and enforces a national expiration date regimen separate from FDA rules.

States cannot require any additional date labeling beyond federal law, so eggs and other fresh items have identical dating regulations in every state.

Federal law generally does not require date labels on foods except for a required use-by date on infant formula; some states may impose date rules for eggs and other fresh items.