Federal truck rules upset Oklahoma state farmers Farmers and ranchers complained Thursday about a federal law that requires them to have a commercial driver's license if they drive farm trucks that can carry more than 10,000 pounds into another state to deliver crops or livestock or to buy supplies. "We do not make a living with our trucks, but we have to have our trucks to make a living,” Bob Howard, a farmer near Altus, said during a forum on the federal legislation. Most heavy pickups can haul more than 10,000 pounds, said U.S. Rep. Mary Fallin, R-Oklahoma City, a member of the U.S. House Transportation and Infrastructure Committee. She conducted a forum on the legislation at the state Capitol, which attracted nearly 100 people. Fallin said when a truck is considered a commercial motor vehicle, the driver must comply with federal requirements of a professional truck driver, including having a commercial driver's license and medical examination certificate, documenting hours of driving and becoming subject to controlled substance and alcohol testing. Failure to comply results in fines....