Mich. Comp. Laws § 552.2104: Remedies.

Sec. 104.

(1) Remedies provided by this act are cumulative and do not affect the availability of remedies under other law, or the recognition of a support order on the basis of comity.

(2) This act does not do either of the following:

(a) Provide the exclusive method of establishing or enforcing a support order under the law of this state.

(b) Grant a tribunal of this state jurisdiction to render judgment or issue an order relating to child custody or parenting time in a proceeding under this act.