Austria decided today that Hotels will be closed. As will be restaurants. So if you rent an apartment you might be able so ski, the lifts are open but otherwise, no.
From December 7 Austria will use a new metric for risk countries. If the 14-day number is above 100/100k a 10 day quarantine is mandatory, after 5 days a negative PCR-test is possible to end quarantine early. https://www.bmlrt.gv.at/tourismus/co...na_gaeste.html