The regulations say "or", not "and". When hunting Deer, Antelope, Bighorn Sheep, Mountain Goat, Mountain Lion or Black Bear, the archer must be equipped with a bow of not less than 40 pounds of draw weight or (that's OR, not AND) possessing the ability to cast a hunting arrow of 400 grain weight at least 160 yards. When hunting Elk, Moose or Wild Bison the hunter must be equipped with a bow of not less than 50 pounds draw weight or (that's OR, not AND) possessing the ability to cast an arrow of 500 grain weight at least 160 yards.