The safety and welfare of District students is of paramount importance to the Board of Education. Accordingly, no person will operate a District school bus unless the person possesses a valid school bus permit and has complied with the regulations of the Department of Revenue, Department of Transportation, the Missouri Department of Elementary and Secondary Education and other regulatory agencies. In addition to the health certificate required for each current school term, the Board may require evidence of continued good health from individual drivers at any time it deems necessary.