> This is already present insofar as hardware requirements in radios - radios cannot be permitted to listen on frequencies reserved for cell phones, and must not be restricted in such way as they can be easily modified to enable it (e.g., a header/jumper). This really just extends this requirement that it is non-trivial to enable illegal broadcasting or reception on software defined radios.
Cough, cough, HackRF(https://greatscottgadgets.com/hackrf/) + GNURadio(http://gnuradio.org/) don't seem to have these limitations.