Mich. Comp. Laws § 700.7504: Spendthrift provision or support provision; exceptions; "child" defined.

Sec. 7504.

(1) The interest of a trust beneficiary that is subject to a spendthrift provision, a support provision, or both may be reached in satisfaction of an enforceable claim against the trust beneficiary by any of the following:

(a) A trust beneficiary's child or former spouse who has a judgment or court order against the trust beneficiary for support or maintenance.

(b) A judgment creditor who has provided services that enhance, preserve, or protect a trust beneficiary's interest in the trust.

(c) This state or the United States.

(2) The court shall order the trustee to satisfy all or part of a judgment described in subsection (1) only out of all or part of distributions of income or principal as they become due.

(3) Notwithstanding that the terms of the trust include a spendthrift provision, this section does not apply to the interest of a trust beneficiary that is subject to a discretionary trust provision.

(4) As used in this section, "child" includes any person for whom an order or judgment for child support has been entered in this or another state.