This is actually happening in the organic food certification industry in Germany, where a ton of different certificates exist. The EU-own certificate is the mo

This is actually happening in the organic food certification industry in Germany, where a ton of different certificates exist. The EU-own certificate is the most lenient (AFAIK it allows of up 0.9% GM food in feed for animals if there is no alternative), the most strict one is the Demeter certificate, a pretty old one based on the slightly crazy teachings of Rudolf Steiner, complete with cosmic energy. Then there's Biokreis, Bioland, Biopark, Ecoland, Ecovin, and more, all of which have different requirements. No-one can keep up with these.