When will the proof of vaccination requirement go into effect for indoor, on-mountain quick-service restaurants? This protocol will be in effect as each mountain opens for the 2021-22 season. Related articles What if I am not vaccinated or forget my proof of vaccination? Will bars be open for the 2021-22 season? Will vaccinations be required to visit bars? How will your dining reservations work? What qualifies as proof of vaccination for guests looking to dine at indoor, on-mountain, quick-service restaurants this season? Can I grab food and eat outside if I don't have a reservation?