These "interpretations" are unsigned. They are not published by PBUC nor sanctioned by it. They are from a very good amateur umpire in Galveston, I believe, name Steve Cutchen. (I know he's good because he has some of my stuff on his site.)
You can find official PUBC interpretations in their manual or the BRD. PBUC has no position on over-running first base on an award.