What is SAE Level 2 Autonomy in Driving Mode?

A vehicle to become a SEA Level Autonomy means the computer in the car should be capable of steer and acceleration/ deceleration by the parameters in the roadside or the environment where the vehicle is at. That means if the driver is disengaged from physically operating the vehicle by having his or her hands off the steering wheel and foot off pedal at the same time according to SAE standards and publications.

However the driver should be seated to respond to signal lights and traffic signals which are there.

Source - Wikipedia & SAE