We kind of have this kind of regulation in EU. A classic example is that commercial eggs must not be washed. This is made into an EU regulation and part of the

We kind of have this kind of regulation in EU. A classic example is that commercial eggs must not be washed. This is made into an EU regulation and part of the reason for it is to enable and encourage free trade by having everyone using the same rules. Free trade was one of the founding principles of the EU and shared regulations for food production are fairly often referenced when people discuss the pro and cons of EU membership. In some cases I have seen regulations relaxed in my own country in order to comply with the EU regulation, and at other times been made more strict, all for the goal of more trade between countries.