Neither the owner, licensee, nor operator of a visual or sound radio broadcasting station or network of stations nor his or her agents or employees shall be liable for any damages for any defamatory statement published or uttered in, or as a part of, a visual or sound broadcast by a candidate for political office in those instances in which, under the acts of Congress or the rules and regulations of the Federal Communications Commission, the broadcasting station or network is prohibited from censoring the script of the broadcast.