Going into Idaho from Oregon several years ago we were required by Idaho law to stop at the scales east of Lewiston to show negative coggins test for a load of horses and mules. They were upset we took their time at the front desk. Didn't even look at our papers. On the way back to Oregon we drove right past even though there was a sign to have your elk checked, didn't want to waste their time. No money to be made from legal folks, I guess.