735 ILCS 5/8-904
The application provided in Section 8-903 of this Act shall allege: the name of the reporter and of the news medium with which he or she was connected at the time the information sought was obtained; the specific information sought and its relevancy to the proceedings; and, either, a specific public interest which would be adversely affected if the factual information sought were not disclosed, or, in libel or slander cases, the necessity of disclosure of the information sought to the proof of plaintiff's case. Additionally, in libel or slander cases, the plaintiff must include in the application provided in Section 8-903 a prima facie showing of falsity of the alleged defamation and actual harm or injury due to the alleged defamation.
735 ILCS 5/8-904