> Well, how fine grained do we need to get?

As always: it depends. There are many municipalities throughout the US that are content with (or can only afford) county-level enforcement. If their residents want something more localized, they need to do what it takes to create that.

In this case, what’s happened is fine. Leaving it up to local residents and their local government to form a new trustworthy enforcement agency is fine. Leaving it up to them to not do that is also fine.