ST. LOUIS (AP) — A mid-Missouri rancher and political activist is suing the state for the second time in a week, this time alleging that a law allowing commercial vehicles to be pulled over and inspected without cause is unconstitutional.

Ron Calzone of Rolla filed the federal suit Wednesday. A spokeswoman for Attorney General Chris Koster says the suit is being reviewed.

Calzone was pulled over while driving his dump truck in 2013, though he says he was doing nothing wrong. He refused to consent to an inspection and was charged with a misdemeanor. The charge was dropped.

Calzone is director of Missouri First, a think tank promoting limited government. On May 29th, he sued over a state law dealing with issues ranging from fire sprinklers to shingles, claiming it has too many provisions.