Section 891.23 - Copies of insurance books(1) Copies of the entries in the books of any life or mutual benefit insurance corporation or association engaged in doing business on the level premium or assessment plan, together with statements verified by the custodian of the books, showing the number of members insured in or belonging to the corporation or association, and the number of members in each class or grade thereof, and the aggregate amount that would be due from them upon a single assessment, and that the copies are true and are taken from the regular books of the corporation or association used and kept for the transaction of its business, and that the books are now in his or her custody or under his or her control, shall be received in all proceedings as prima facie evidence of the entries or statements.(2) No officer of any corporation or association described in sub. (1) may be compelled to produce any books or records of the corporation or association, except by special order of the court or officer before whom the action or proceeding is pending. Verified copies and statements shall be furnished to the attorney who reasonably requires them, at least 6 days before the time set for the trial or hearing of the action or proceeding, and the books and records shall be subject to the inspection of any interested party or his or her attorney to the extent prescribed by the court or officer.