Seems like the opposite of what's being discussed in Canada now as a result of the recent tariff stuff: inter-provincial trade is hampered by different rules and regulations, and now there's incentive and a real push to harmonize them across the country to reduce the difference in order to increase flow of trade within the country. One news article mentioned something like 600 licensing/professional regulatory bodies in the country, each with different rules which hamper both trade and professionals seeking to work in another part of the country.

I know it's not a direct comparison, but feels similar in a way.

This proposal (haven't read it to be fair, only read comment here) seems to go in the opposite direction and at first glance would be a race to the bottom in some places at least (as mentioned by another commenter here) than improve the situation overall.