As of July 1, 2007, the State Department of Education regulations require Oklahoma certified school bus drivers to attend a minimum of four (4) hours of professional development inservice each year. Local districts, Career Techs, state agencies and professional associations may present classes from the SDE approved list of topics. A class may be presented for 30 minutes, 1 hour, 2 hours, as desired. Attendance records must be kept by the employing school district.