Chapter 6-11 School Bus “S” Endorsement Converting Out of State CDL Endorsements Due to the federal Motor Carrier Safety Improvement Act (MCSIA) of 2006, all school bus operators must have a school bus “S” endorsement on their Commercial Driver’s Licenses, in addition to a DTE school bus certificate. A driver’s ability to operate a school bus will be affected by this new requirement. Any driver who does not meet this new requirement will not be allowed to drive a school bus. School Bus/Pupil License links School Pupil Transport (7D) License Application School Bus License Page at the RMV School Bus “S” Endorsement Brochure School Bus Instructor Certificate Diabetes Medical Evaluation Form (7D) Cardiovascular Medial Evaluation Form (7D) 12/09 6:69http://www.mass.gov/rmv/forms/21038.pdf http://www.mass.gov/rmv/license/17bus.htm http://www.mass.gov/rmv/license/NewSEndorsementBrochure.pdf http://www.mass.gov/rmv/forms/21356.pdf http://www.mass.gov/rmv/forms/Diabetes_Medical_Evaluation_Form.pdf http://www.mass.gov/rmv/forms/21842.pdf