20
Persons operating…unintentional radiators…shall not…have
any vested right to continued use of any given frequency…
Operation… subject to conditions that no harmful interference
is caused and that interference must be accepted. 
Harmful interference defined as:
“any emission radiation or induction which endangers the
functioning of a radio navigation service or other safety
services or seriously degrades,obstructs or repeatedly
interrupts a radio communication service operating in
accordance with this chapter.”
Rights and responsibilities
Sec. 15.5