(3) Subject to the provisions of s.
726.105, for purposes of this section, the assets in:
(a) A trust described in s.
2523(e) of the Internal Revenue Code of 1986, as amended, or a trust for which the election described in s.
2523(f) of the Internal Revenue Code of 1986, as amended, has been made; and
(b) Another trust, to the extent that the assets in the other trust are attributable to a trust described in paragraph (a),
shall, after the death of the settlor's spouse, be deemed to have been contributed by the settlor's spouse and not by the settlor.