Infield Fly?

[Art N]

Does anyone have any sort of guide they go by in terms of how many feet onto the outfield grass a ball has to be before it ceases to be defined by the "infield" fly rule? [/B][/QUOTE]
Why does the outfield grass have anything to with it? You could have fly in the middle of the diamond that could be wind blown and not be able to be caought with ordinary effort. Depending on the skill level of the players, a "lower level league's" fly that hits the edge of the dirt/outfield area maybe too far for ordinaryeffort, and routine for the majors. You can IFR called at the MLB level with the SS 10 yards or more in the OF.
Any comments or rebuts?