And I think that if you operate from a grass field that a taildragger with giant tires up front should be required. How about "coms should be
encouraged" instead of your blanket exclusionary mandate?
*Unless an airplane has a wired external antenna, the range of a handheld operated inside an airborne craft is notably decreased compared to a panel mounted aviation radio, and the transmissions from handhelds can be more confusing and unintelligible than it is worth. This is not 100% true 100% of the time, rather, most of the time. {Dependent on aircraft type, construction, altitude, etc.}