(1) No provision of this subchapter shall be construed to prohibit any library or any business operating jointly with a library from disclosing information for the purpose of: Collecting overdue books, documents, films, or other items or materials owned or otherwise belonging to the library;
(2) Collecting fines on overdue books, documents, films, or other items or materials; and
(3) Contacting its patrons by telephone, mail service, or other medium for the purpose of notifying, informing, and educating patrons or otherwise promoting the legitimate programs, policies, and other interests of the library.
(4) Aggregate statistics shown from registration and circulation records with all personal identification removed may be released or used by a library or library system for research or planning purposes.