The Berne Convention Implementation Act of 1988 amended the law to make the use of a copyright notice optional on copies of works published on and after March 1, 1989 and also revised Section 403. After the adoption of this act, a copyright notice was no longer necessary to secure copyright protection. Including the notice, however, does continue to confer certain benefits, notably in the challenging a defendant's claim of innocent infringement, where the question of proper notice may be a factor in assessing damages in infringement actions. Under the revised Section 403, these benefits are denied to a work consisting predominantly U.S. Government works "unless the notice of copyright appearing on the published copies or phonorecords to which a defendant in the copyright infringement suit had access includes a statement identifying, either affirmatively or negatively, those portions of the copies or phonorecords embodying any work or works protected under this title."
