personal away from the ball

[l3will]

Originally posted by cad
This is a live ball foul treated as a dead ball foul. Access penalty yardage on the try.

By "This is a live ball foul" do you mean the original play??
The personal foul occurred before A entered the end zone, so
why do you enforce the yardage on the try? This isn't an unsportsmanlike foul or a non-player foul.

How can you justify that by rule?