The U.S. Supreme Court has again declined to review a Montana law that exempts guns made and kept in the state from federal regulation.

The high court on Monday denied a petition from Montana Attorney General Tim Fox to review prior court rulings against the state law.

Justices in January rejected a related petition from Gary Marbut with the Montana Shooting Sports Association.

Montana's Legislature passed a law in 2009 that says firearms that remain in the state where they were manufactured are not subject to Congress' authority to regulate interstate commerce.

At least eight other states have passed similar laws.

Marbut says the issue could be revived if a plaintiff files a lawsuit in one of those states.