Earlier they didn't quite have that authority.
So, what is it you are talking about?
The Constitution provides that the states may regulate alcohol as they wish.
The Constitution provides that the states may reasonably regulate alcohol as long as their laws comply with due process of law. [see the 14th]
Earlier they didn't quite have that authority. So, what is it you are talking about?
Good of you to admit you're confused. What specifically did I 'talk about' that you can't understand?