Very interesting; thank you. The trouble with minimum thresholds is they are barely or not policed or enforced, and provide an enormous loophole for anyone caught in the act. So food companies are very keen to ensure the thin end of that wedge gets into any relevant legislation, on the apparently reasonable grounds that cross contamination may happen.There is a story behind this. Several vegan associations were sollicitated and came up with a standard for EU they intended to become a law. This had been on the European parliament's tablets since almost 2010 actually! Then, ISO also came up with a standard that is closer to the food producer's wishes, ISO 23662. From what I can gather, the main point of disagreement is not about a minimum threshold as cross contamination is considered impossible to completely banish, but the associations include ethical criterias, such as that the producer firm should not participate in any animal testing, not only for said product. Vegan isn't only about food but about global treatment of animals. So I think counter lobbying is the reason why there is no legal regulation in the EU.
I wish ours took more interest in the abuse of language. It matters.In France government is much more worried about vegan products wrongly borrowing animal products name : it is forbidden to call a product almond milk, vegan butter or soy yogurt...than about it's content.
It's not just the Chinese; this from wikipedia:Right now for example they have a campaign regarding honey imported from China : testing showed that in average, there is less than 45% honey in the product and the rest is glucose syrup.
According to the Codex Alimentarius of the United Nations, any product labeled as "honey" or "pure honey" must be a wholly natural product, although labeling laws differ between countries.[32] In the United States, according to the National Honey Board, "Ensuring honey authenticity is one of the great challenges facing the honey industry today. Over the past half century, a number of honey testing methods have been developed to detect food fraud. To date, there is no single universal analytical method available which is capable of detecting all types of adulteration with adequate sensitivity.".[33]
Isotope ratio mass spectrometry can be used to detect addition of corn syrup and cane sugar by the carbon isotopic signature. Addition of sugars originating from corn or sugar cane (C4 plants, unlike the plants used by bees, and also sugar beet, which are predominantly C3 plants) skews the isotopic ratio of sugars present in honey,[33] but does not influence the isotopic ratio of proteins. In an unadulterated honey, the carbon isotopic ratios of sugars and proteins should match. Levels as low as 7% of addition can be detected.[33]