What's the screening process for movies at the white house? Does a movie have to be requested to be seen?

According to a New York Times article, the White House has to request the movie:





';The movies are sent overnight directly from the studios, in 35-millimeter film format, as soon as the White House requests them. The system was set up many presidencies ago by Jack Valenti, the adviser to President Lyndon B. Johnson and the recently retired president of the Motion Picture Association of America.';





Full text of the article is here: http://query.nytimes.com/gst/fullpage.ht鈥?/a>





And another nice piece on the history of the theater is here:


http://www.whitehousemuseum.org/east-win鈥?/a>What's the screening process for movies at the white house? Does a movie have to be requested to be seen?
How would any civilians know this?