Those signs have been replaced with a “Room Occupied” sign, which will not prevent staff from entering a room. In fact, Disney employees are now required to enter each room at least once a day.

“The hotel and its staff reserve the right to enter your room for any purposes including, but not limited to, performing maintenance and repairs or checking on the safety and security of guests and property,” Disney’s updated Terms of Service say.

This means that even guests who decide to pass on room service on a given day will still be subject to a room check.

A popular theory is that the new measures are designed to boost security after the Oct. 1 shooting massacre in Las Vegas, where a lone suspect inside a highrise hotel room fired more than 1,100 rounds into a crowd attending an outdoors music festival below, killing 58 people and injuring more than 500.

The change is already in effect at Grand Floridian, Polynesian, and Contemporary Resorts, also known as the monorail resorts. Guests there received a paper notice about the change. The monorail resorts feature a setup similar to Mandalay Bay in Las Vegas with rooms facing crowded areas on the resort’s grounds.

The same changes are expected to roll out to Disney’s other resorts in the coming weeks.