This is simply a consequence of the law not being a federal law. If it was they would simply suck it up and post the damn salary range. However, since its only local to Colorado, then the easy route is to simply avoid hiring there.
BUt iF It wAz A fEdERal LAw tHey WoUlD lEAvE tHe US
BUt iF It wAz A fEdERal LAw tHey WoUlD lEAvE tHe US
To that I say, not a chance.