The Food Standards Code standard that governs use-by and best-before dates on packaged food.
A use-by date is about safety and food must not be sold or eaten after it, while a best-before date is about quality and food may still be sold and eaten afterwards if it is safe and suitable.
Yes, provided the food is still safe and suitable and has not deteriorated or been damaged, though it cannot be sold after a use-by date.
Foods that may become unsafe to eat after a certain time, such as many chilled ready-to-eat products, carry a use-by date.
Most packaged food needs a date mark, though some products with a long shelf life, such as those that keep for more than two years, are exempt under the standard.
The business that packages and labels the food is responsible for applying the correct type of date mark under Standard 1.2.5.