§ 2-6-103 — Property passed may be governed by trust instrument

By a will signed and attested as provided in this article a
testator may devise and bequeath real and personal estate to a
trustee of a trust which is evidenced by a written instrument in
existence when the will is made and which is identified in the
will, even though the trust is subject to amendment,
modification, revocation or termination. Unless the will
provides otherwise the estate so devised and bequeathed is
governed by the terms and provisions of the instrument creating
the trust including any amendments or modifications in writing
made before or after the making of the will and before the death
of the testator.