Hard to say. Possibly equal fault by both parties but most likely the person backing out.
Backing up--it is your fault.
The person who is backing out of the parking space
be sure that the way is clear, look over your back shoulder while backing, and yield to approaching traffic.never rely on your rearview mirrow alone turn around and look.
When approaching an aircraft at night, vehicle operators should always make themselves visible to the pilot. Aircraft cannot stop suddenly and do not have great visibility.
Were you both backing at the same time 'at impact'? Will depend on where damage is etc, but assuming both backing and bumpers hit more than likely will be a 50/50 liablitly decision made.
The person backing out. If you were in the lane/road behind them they needed to use caution when backing out.
Any time the driver who is backing is at fault, in all 50 states.
If it only happens when backing up, you may have the parking brake engaged.
both of you for not looking back
Depends on the jurisdiction, but typically, two vehicles backing up is a 50/50.
If you strike him - you are at fault. He can be charged with the No Parking violation but YOU are charged with the collision.
You are at fault.