Are rubber bat knobs illegal?

[socalump]

According to ASA Rule 3, Section 1, I:

As long as the distance from the Safety Grip, Rubber Bat Knob piece to the apex of the Knob does not exceed 0.3750 inches. There is nothing in the ASA rule book that says you can not use a "rubber bat knob", however, you can not use a "flare" or "cone" grip attachment...the rubber bat knob cover is neither.

SoCalUmp