The most important part for some guests:
According to Disney, "for the first time guests of all ages can wear your funniest, Disney-ist, most creative costumes during Magic Kingdom Park regular operating hours from Sept. 15 to Oct. 31. As an important reminder, costume masks are not permitted for adults; only children younger than 14 years old are permitted to wear costume masks."
Now, how long do you think it will take for Disney to clarify that a child's costume mask (the full face plastic kind with a tiny mouth hole) cannot substitute for a pandemic mask and the pandemic mask will still have to be worn under the costume mask?