The affected works are those which were in the public domain either due to a lack of international copyright agreements between the U.S. and the country of origin of the work, or due to a failure to meet U.S. copyright registration and notification formalities. Also affected are works which did have previous U.S. copyright, but which entered the public domain due to a failure to renew the copyright. The law defines all of the affected works as "restored works" and the copyright granted to them as "restored copyright", even though many of the works never had U.S. copyright to restore.