o or more
than ten years before that date. A copy of the notice shall be
recorded in the Copyright Office before the effective date of
termination, as a condition to its taking effect.

(B) The notice shall comply, in form, content, and manner of service,
with requirements that the Register of Copyrights shall prescribe by
regulation.

(5) Termination of the grant may be effected notwithstanding any
agreement to the contrary, including an agreement to make a will or to
make any future grant.

(6) In the case of a grant executed by a person or persons other than
the author, all rights under this title that were covered by the
terminated grant revert, upon the effective date of termination, to all
of those entitled to terminate the grant under clause (1) of this
subsection. In the case of a grant executed by one or more of the
authors of the work, all of a particular author's rights under this
title that were covered by the terminated grant revert, upon the
effective date of termination, to that author or, if that author is
dead, to the persons owning his or her termination interest under
clause (2) of this subsection, including those owners who did not join
in signing the notice of termination under clause (4) of this
subsection. In all cases the reversion of rights is subject to the
following limitations:

(A) A derivative work prepared under authority of the grant before its
termination may continue to be utilized under the terms of the grant
after its termination, but this privilege does not extend to the
preparation after the termination of other derivative works based upon
the copyrighted work covered by the terminated grant.

(B) The future rights that will revert upon termination of the grant
become vested on the date the notice of termination has been served as
provided by clause (4) of this subsection.

(C) Where the author's rights revert to two or more persons under
clause (2) of this subsection, they shall vest in those persons in the
proportionate shares provided by that clause. In such a case, and
subject to the provisions of subclause (D) of this clause, a further
grant, or agreement to make a further grant, of a particular author's
share with respect to any right covered by a terminated grant is valid
only if it is signed by the same number and proportion of the owners,
in whom the right has vested under this clause, as are required to
terminate the grant under clause (2) of this subsection.