Copyright Law of the United States of America · Library of Congress. Copyright Office
Section 301. Preemption with respect to other laws.
Section 303. Duration of copyright: Works created but not published or copyrighted before January 1, 1978. Copyright in a work created before January 1, 1978, but not theretofore in the public domain or copyrighted, subsists from January 1, 1978, and endures for the term provided by section 302. In no case, however, shall the term of copyright in such a work expire before December 31, 2002; and, if the work is published on or before December 31, 2002, the term of copyright shall not expire before December 31, 2027.
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