To ensure that only medically qualified individuals are allowed to operate an interstate truck or busFMCSA today 12/1/2008 issued a final rule that will require states to merge the commercial driver’s license ( CDL ) and the driver’s medical examination certificate into a single electronic record. When fully implemented by the states in three years, the new combined CDL will streamline record keeping obligations for the states and CDL holders, while providing instant electronic access to the CDL holder’s medical certificate by state and federal enforcement officials.