Each year, Yale University Press seeks one book-length poetry manuscript to be published in the Yale Series of Younger Poets. The competition is open to any American citizen under forty years of age who has not published a book of poetry (contestants must be under the age of forty at the time they submit the manuscript to the competition). The winner receives royalties when the book is published.
Submissions for the 2012 Competition must be postmarked no earlier than October 1, 2011 and no later than November 15, 2011.
Full guidelines here.