VEH §22454: (a) The driver of any vehicle, upon meeting or overtaking, from either direction, any schoolbus equipped with signs as required in this code, that is stopped for the purpose of loading or unloading an

(a) The driver of any vehicle, upon meeting or overtaking, from either direction, any schoolbus equipped with signs as required in this code, that is stopped for the purpose of loading or unloading any schoolchildren and displays a flashing red light signal and stop signal arm, as defined in paragraph (4) of subdivision (b) of Section 25257, if equipped with a stop signal arm, visible from front or rear, shall bring the vehicle to a stop immediately before passing the schoolbus and shall not proceed past the schoolbus until the flashing red light signal and stop signal arm, if equipped with a stop signal arm, cease operation. (b) (1) The driver of a vehicle upon a divided highway or multiple-lane highway need not stop upon meeting or passing a schoolbus that is upon the other roadway. (2) For the purposes of this subdivision, a multiple-lane highway is any highway that has two or more lanes of travel in each direction. (c) (1) If a vehicle was observed overtaking a schoolbus in violation of subdivision (a), and the driver of the schoolbus witnessed the violation, the driver may, within 24 hours, report the violation and furnish the vehicle license plate number and description and the time and place of the violation to the local law enforcement agency having jurisdiction of the offense. That law enforcement agency shall issue a letter of warning prepared in accordance with paragraph (2) with respect to the alleged violation to the registered owner of the vehicle. The issuance of a warning letter under this paragraph shall not be entered on the driving record of the person to whom it is issued, but does not preclude the imposition of any other applicable penalty. (2) The Attorney General shall prepare and furnish to every law enforcement agency in the state a form letter for purposes of paragraph (1), and the law enforcement agency may issue those letters in the exact form prepared by the Attorney General. The Attorney General may charge a fee to any law enforcement agency that requests a copy of the form letter to recover the costs of preparing and providing that copy. (d) This section also applies to a roadway upon private property.