Please change the thread title to something less misleading. This is a story about something you heard from someone who heard it from someone who heard it from yet someone else.
The relevant part of the AS mask policy, published prominently on its website is plain English & clear:
After you sip or snack, please put it back. Your mask or face covering must cover your nose and mouth and should only be removed when briefly eating or drinking. Masks with valves, mesh material or holes of any kind will not be allowed.