In the EU, the production and commercialization of GMOs and GMO-containing or -derived food and feed products are regulated by the 'Food and Feed' Regulation (EC)No 1829/2003 and the 'Labeling and Traceability' Regulation (EC) No 1830/2003.Labelling is mandatory above a 0.9% threshold GMO percentage, relative peringredient (and translated as plant taxa for analytical purposes). Analytical methods fordetection and accurate quantification of GMO contents in derived food and feedproducts, require robust detection methods and adequate reference materials asidentifier and quantifier controls.