Street legal varies too much locale to locale. You need to find someone in your state/ province who has been there. The number plate is on the rear of the trac. if it is still there. It is NOT a VIN as DMV understands it. I know of no where else the number was stamped (frame etc.)
As an example, Oregon, USA does not license or title snow cats. They are legal, nonconforming users the same as farm tractors.