Driver license, to provide additional circumstances in which an expert witness may give expert testimony, provide for add'l chemical tests that may be used to determine if a person was driving under the influence, to provide for who can draw blood, provide that a witness may provide testimony on the results of horizontal gaze nystagmus test, Secs. 12-21-160, 32-5-192, 32-5-200, 32-5A-194, 32-5A-300, 32-5A-301, 32-5A-302, 32-5A-303, 32-5A-304, 32-5A-306, 32-5A-307, 32-5A-308, 32-6-49.13 am'd.