(Ontario Safety League APPROVED Signing Authority (MTO)) The Government of Ontario requires drivers to acquire a valid Z-endorsement certification to operate any vehicle equipped with air brakes in the province of Ontario. This Z Air Brake Endorsement requirement includes commercial transport trucks, motor homes, buses and medium sized trailers. Taylor Truck Training Services provides a three-day program which consists of 12 hours of in-class teaching instruction, practical training, written and practical test. On successful completion of both tests (written and practical) students will receive the Z-Endorsement certificate from the Ontario Safety League