Oregon Revised Statutes Education and Culture § 357.975

It shall be unlawful for any person willfully or maliciously to detain any library materials belonging to a publicly supported library or privately supported school, academic or research library or incorporated library for 30 days after notice in writing from the librarian of such library, given after the expiration of time which by regulations of such library such materials may be kept. The notice shall bear upon its face a copy of this section and of ORS 357.990.