John Margolies Roadside America photograph archive (1972-2008), Library of Congress, Prints and Photographs Division.
Free film screenings open to a film club or the general public often require the purchase of films with public performance rights (PPR). This is because "you need permission from the copyright holder to show that film 'publicly' (that is, in a group beyond an ordinary gathering of friends and family)." 1
To perform or display a work “publicly” means—
(1) to perform or display it at a place open to the public or at any place
where a substantial number of persons outside of a normal circle of a
family and its social acquaintances is gathered. (17 U.S.C. § 101. Definitions.)
Look for this note in the BULS record:
This video has limited public performance rights and may be screened by a public group that is not charged for the viewing, or transmitted on a closed-circuit system within a building or single campus.