It is unlawful to retain any book, newspaper, magazine, pamphlet, document, record, film, print, manuscript, or other property belonging to or in, or on deposit with, the Everett Public Library, or any branch, reading room, deposit station, museum, or institution operated in connection therewith, for a period exceeding thirty days after the mailing by certified mail to the borrower’s address on file with said library of a notice in writing to return the same. Such notice shall be given after the expiration of time which, by the rules of the Everett Public Library, such article or other property may be kept. If such library materials are not returned after the date indicated on the notice, the borrower shall be billed for the purchase price of the materials, regardless of whether the materials are returned after the final return date. Such notice so mailed shall bear on its face a copy of this section. (Ord. 1145-85 § 124(2), 1985.)