Article R122-31 of the French Intellectual Property Code
I.-Publicly accessible libraries, museums, archive services or institutions holding film, audiovisual or sound heritage wishing to exploit unavailable works under the conditions mentioned in the first paragraph of I of article L. 122-5-5 shall publish the following information in advance on their website, in a dedicated and identifiable section: -the terms of the reasonable investigative efforts made by the institution to determine whether a work is available to the public…