It needs to be spelled out so that it is enforced equally from one manager to the next as well. There is so much back and forth and misinformation from the people who are intended to be leaders that I think most people would be surprised. You can ask the same question about a policy to 6 different managers and get a different (yet confident) answer from each one- there needs to be consistency. If they are going to make a big push about enforcing a previously unwritten policy than I think its only fair they spell it out a bit more so that we all know where we stand.
You ask six managers the same question and you get eight answers and at least one confused look in return.
That and Disney managers are rather known for their ability to selectively enforce a policy, based on favoritism.