S_Flex:
The FCC may issue a permit that waives the law for private use.
The FCC can do nearly anything it wants within it's mandate as codified in federal law. So what is point, that you will be asking and expecting the FCC for a permit to operate your FM broadcast jammer? I didn't think so.
One can operate a FM transmitter of a certain low power limit (covered I think by FCC part 15 rules, 100mw or less?) without prior permit or license. However if that ends up interfering with your next door house's FM reception and they complain to the FCC and if their is nothing wrong with their FM receiver the FCC will come knocking on your door to stop you from transmitting your part 15 device.
Lefty