While sitting on the edge of the bed with good head control, the person is able to extend their arm to prevent falling when gently pushed to the side.
To Verify
The person should be able to hold their head up without head supports for at least 30 minutes and extend their arms to prevent a fall when pushed before walking is attempted.
To Rule Out
The difference between ACL 2.2 and 2.4 is independent walking, which is an obvious difference. To confirm ACL 2.2, the person does not have the ACL 2.4 sense of balance and trunk control necessary to walk without assistance.