Mandatory deposit (17 U.S.C. section 407 ) requires the owner of copyright or of the exclusive right of distribution to deposit in the U.S. Copyright Office for the use of the Library of Congress two complete copies of the best edition of a published work within 3 months after a work is published. Copies of all works under copyright protection that have been published or distributed in the United States must be deposited with the Copyright Office within 3 months of the date of first publication.