Md. Code, Courts and Judicial Proceedings § 3–503

An owner, licensee, or operator of a television or radio station or network of stations, and his agents or employees are not liable for a defamatory statement published or uttered over the facilities of the station or network of stations by a candidate for public office as to his opponents for the office he seeks, if the publication or utterance cannot be censored by the owner, licensee, or operator under any regulation of the Federal Communications Commission or a federal statute.