This SAE Standard provides test procedures, requirements, and guidelines for center high mounted stop lamps (CHMSL) for use on vehicles less than 2032 mm in overall width.
SAE J1957-2000 history
2011SAE J1957-2011 Central High Mounted Stop Lamp Standard for Vehicles Less than 2032 mm Overall Width
2000SAE J1957-2000 Central High Mounted Stop Lamp Standard for Vehicles Less than 2032 mm Overall Width
1993SAE J1957-1993 Center High Mounted Stop Lamp Standard for Vehicles Less Than 2032 mm Overall Width@ Standard