(a) The commissioner is authorized to employ such persons as may be necessary, in the discretion of the commissioner, for the proper enforcement of this chapter, the salaries for such employees to be fixed by the commissioner.

(b) The commissioner is vested with police powers and authority to designate, deputize, and delegate to employees of the Department of Motor Vehicle Safety the necessary authority to enforce this chapter, including the power to stop and inspect all motor vehicles using the public highways for purposes of determining whether such vehicles have complied with and are complying with the provisions of this chapter and all other laws regulating the use of the public highways by motor vehicles, and to arrest all persons found in violation thereof.