Those skiing or snowboarding on Italian resorts are required to follow specific laws. For example, as of January 1, 2022, everyone is required to hold liability insurance to cover damages to third parties (some liability insurance policies already cover this). Those 18 and under are also required to wear helmets while skiing and snowboarding.
One that might be a bit more surprising for some, though it’s certainly well warranted, is that skiing and drinking is treated the same and drinking and driving in Italy. Those with a blood alcohol content above a 0.5% cannot ski or snowboard, in addition to those under the influence of drugs. Given the heavy drinking culture involved with après skiing, it’s not hard to imagine that many people fail to follow those laws (drinking and skiing is explicitly illegal in many parts of the United States, too).
It’s definitely a good idea to follow those laws, though. At some Italian ski resorts, like the Livigno Ski Area, police squads are active on the mountain, and they’ll happily enforce those laws.
Just as an important mention, drinking and skiing isn’t just illegal, it’s very dangerous and it goes against the skier’s Responsibility Code. Don’t be the person that ruins a ski trip because you got wasted and seriously hurt yourself. It’ll suck for you, it’ll suck for your friends, and it’ll suck for the people that have to deal with you. Stay safe out there.