If one of you broke, then it would be the one who didn't break who would be At Fault, if neither of you broke you are both at fault for undue care and attention.
If you were legally parked, the person backing up is at fault. If you were in a "No Parking" area, you are at fault.
If you strike him - you are at fault. He can be charged with the No Parking violation but YOU are charged with the collision.
Usually their is no fault associated with parking lots. I'm sure your insurance company looks at it as your fault.
You are at fault.
It is your fault.
If he was driving forward past his intended parking space to take yours, then he is at fault. Cutting across is not permitted in parking lots although many people do it anyway.
Personally, I think that it should be the fault of the driver going across the aisle, but other may think otherwise.
Whomever caused the accident is generally considered the at fault party. It does not matter whether or not your in a parking lot.
My fault
You can't reset the parking light - It shows you have a fault at that time - Cure the fault and the light will go out - I have a problem with mine - I have an intermittent fault the light only comes on when the parking brake is faulty - most of the time the lights out
it is the FAULT
no matter where a vehicle is parked, the moving vehicle is at fault every time.