Which foods must by law have a use by date on them when sold?

By law, foods that are perishable and pose a safety risk if consumed after a certain period must have a use by date. This includes items like fresh meat, fish, dairy products, and prepared meals. The use by date indicates the last day the product can be safely consumed. Foods that are shelf-stable, like canned goods and dry items, typically do not require a use by date but may have a best before date instead.