Anything not spelled out at the federal level is left to the states to determine but what is it that gives the state that power over people's lives? Just because it says so?
Not "just because it says so" but because it is duly authorized to do so by a properly adopted state constitution or amendment.
That is, presuming the state constitution actually does have such a provision, which is a guess, but I'm not pouring through the 700+ amendments of the Alabama constitution to find out for sure. I'm mostly talking in the theoretical realm here anyway.