California Code, Vehicle Code - VEH § 12517.2

(a) Applicants for an original or renewal certificate to drive a schoolbus, school pupil activity bus, youth bus, general public paratransit vehicle, or farm labor vehicle shall submit a report of a medical examination of the applicant given not more than two years prior to the date of the application by a physician licensed to practice medicine, a licensed advanced practice registered nurse qualified to perform a medical examination, a licensed physician assistant, or a licensed doctor of chiropractic listed on the most current National Registry of Certified Medical Examiners, as adopted by the United States Department of Transportation, as published by the notice in the Federal Register, Volume 77, Number 77, Friday, April 20, 2012, on pages 24104 to 24135, inclusive, and pursuant to Section 391.42 of Title 49 of the Code of Federal Regulations.  The report shall be on a form approved by the department.

(b) Schoolbus drivers, within the same month of reaching 65 years of age and each 12th month thereafter, shall undergo a medical examination, pursuant to Section 12804.9, and shall submit a report of that medical examination on a form as specified in subdivision (a).