This means that Congress and the federal government can regulate interstate commerce, but when it comes to intrastate commerce, federal government has no role. That means that the 10thAmendment comes into effect, which declares that any area where the federal government does not have jurisdiction or the constitution does not claim federal power, is left up for the state to decide.
United States v. Lopez in 1994 said that the government law that created gun-free school zones was unconstitutional. The court ruled that the law overreached the commerce clause in the constitution, because the law does not have economic motive and carrying a gun in a gun-free zone does not affect interstate commerce. Like the gun-free zone, prohibiting our Montana Firearms Act also oversteps the power of the commerce clause, because the right to regulate our firearms does not have an effect on interstate