The United States National Film Preservation Board (NFPB) is the board selecting films for preservation in the Library of Congress' National Film Registry. It was established by the National Film Preservation Act of 1988. The National Film Registry is meant to preserve up to 25 "culturally, historically or aesthetically significant films" each year; to be eligible, films must be at least 10 years old. Members of the Board also advise the Librarian of Congress on ongoing development and implementation of the national film preservation plan.