Mich. Comp. Laws § 500.1101

Sec. 1101. For purposes of this chapter, a "qualified United States financial institution" means an institution that meets either subdivision (a) or (b): (a) Is organized, or in the case of a United States office of a foreign banking organization, is licensed, under the laws of the United States or any state in the United States, is regulated, supervised, and examined by federal or state authorities having regulatory authority over banks and trust companies, and has been determined by the commissioner to meet such standards of financial condition and standing as are considered necessary and appropriate to regulate the quality of financial institutions whose letters of credit will be acceptable to the commissioner. (b) For those institutions that are eligible to act as a fiduciary of a trust, is organized, or in the case of a United States branch or agency office of a foreign banking organization, is licensed, under the laws of the United States or any state in the United States, has been granted authority to operate with fiduciary powers, and is regulated, supervised, and examined by federal or state authorities having regulatory authority over banks and trust companies.