The department shall establish statewide standards for emergency medical services and for emergency medical service systems consistent with this part and applicable federal guidelines for those services, including a requirement that ambulance service providers licensed by the State establish and maintain an alcohol and substance abuse policy for employees that the department deems is equivalent to, or exceeds the provisions of, the safety and health standards established by the federal Department of Transportation for holders of commercial driver’s licenses. In the event the standards are determined or regulated by any other law, or by applicable federal guidelines, standards required to be set by this section shall be at least equivalent to or exceed the other state and federal standards.