For a few years in the early eighties, a manuscript page in pencil sat on Copland's piano stand. It was dated 1973 and bore the title Improvisation. With Copland's permission, pianist Bennett Lerner made the piece into the Proclamation for Piano and gave its premiere in early 1983. During Copland's 85th birthday year, composer Philip Ramey orchestrated Proclamation, also with the composer's authorization.
-Vivian Perlis, 1998