the better rule added would be, if any part of a ball in a pocket was touching on the horizontal surface of the table it isnt considered pocketed.
As a practical matter, your version is of course also correct, but doesn't state the intent as clearly as the quoted rules.
On the table in question, a GC3, jawed balls are
just discernably lower than balls sitting on the table surface. The lowest point of the ball is thus below the level surface of the table and so cannot be "touching on the horizontal surface of the table." I think it's fair to say that the radius of the ball is much larger than the micro radius of the lip of the pocket, and the wording "any part of the ball" is not needed and is possibly misleading as to intent. Jawed balls on my table are not on the playing surface. Period.
It probably isn't clear that I'm agreeing with you. A jawed ball can be considered pocketed if it can be shown to be lower than nearby balls sitting on the surface of the table. I suppose this could be measured accurately with a surface gauge... I happen to have one handy and nearby, but maybe not all refs will carry one.