(1) The owner, licensee, or operator of a visual or sound radio broadcasting station or network of stations, and the agents or employees of any such owner, licensee or operator, shall not be liable for any damages for any defamatory statement published or uttered in or as a part of a visual or sound radio broadcast, by one other than such owner, licensee, or operator, or agent or employee thereof, unless it shall be alleged by the complaining party that such owner, licensee, operator, or such agent or employee, has failed to exercise due care to prevent the publication or utterance of such statement in such broadcast.
(2) It shall be the responsibility of the owner, licensee or operator to show that due care was used.
(3) In no event, however, shall any owner, licensee, or operator, or the agents or employees of any such owner, licensee or operator of any such a station or network of stations, be held liable for any damages for any defamatory statement uttered over the facilities of such station or network by any candidate for public office, unless such statement is made by an agent or employee of the owner, licensee, or operator in the course of employment.