Any person who willfully retains a book, newspaper, plate, picture, photograph, engraving, painting, drawing, map, magazine, document, letter, public record, microfilm, sound recording, audio visual materials in any format, magnetic or other tapes, artifacts or other documentary (written or printed) materials, or all materials of any kind whatsoever belonging to any public library for thirty days after the mailing date of a written notice demanding the return of said material and giving notice of said violation, forwarded to that person's last known address, is guilty of a misdemeanor, and, upon conviction thereof, shall be fined not more than $200: Provided, That a date or dates designating a grace period for the return of library materials to public libraries shall be established, said dates to be established by the state Library Commission pursuant to rules and regulations promulgated thereto.

A conviction or payment of any fine shall not be construed to constitute payment for library material, nor shall a person convicted under this section be thereby relieved of any obligation to return to the library such material. Further, a conviction or payment of any fine shall not be construed as a waiver of any nominal daily fine which may be imposed by library rules, regulations or policies.

The parent or guardian of a minor who willfully commits any act prohibited by this section shall be liable for all damages so caused by the minor up to the amount of $2,500, after the parent or guardian is served with proper written notice as aforementioned.