Helmets are now mandatory for downhill ski'ers and snowboarders in Nova Scotia. The new law comes into effect today and carries a stiff fine for those caught not wearing the protective head-gear. The all-ages mandatory snow sport helmet law states that only A-S-T-M, Snell, C-S-A or C-E-N approved helmets can be worn. People age 16 or older are responsible for wearing an approved helmet, parents are responsible for those younger than 16. Those caught without a helmet can face a minimum fine of 250-dollars.