What is the safe limit for food allergens in products?

The Australia New Zealand Food Standards Code of FSANZ (Food Standards Australia New Zealand) has a mandatory requirement for labelling of any presence of the key allergens and their derivatives in products and their derivatives.

There is currently no threshold in the legislation. However while most of the ELISA kits have a limit of detection around 1 ppm, if you are knowingly adding an allergen or a derivative of an allergenic product, you are required to label its presence, regardless of whether it can be detected or not.