One of the best ways to learn the laws in your area and make sure you are ready to ride is to take a snowmobile safety class.
These classes will teach you everything you need to know and teach you local regulations.
They will also provide you with any certifications or licenses you would need to jump on the slopes.
Learning the rules of snowmobile safety before hand gives you the ability to practice before your ride. Better to over prepare than getting hurt.
Below are a few helpful links to educate yourself on snowmobile riding and the risks.