How do I know if a food has been irradiated?

All foods which have been irradiated must be labelled as 'irradiated' or 'treated with ionising radiation'. Where an irradiated food is used as an ingredient in another food, the words 'irradiated' or 'treated with ionising radiation' should appear next to the ingredient in the list of ingredients.

When irradiated food is not pre-packed these same words shall appear together with the name of the product on a display or notice above or besides the container in which the products are placed.