Mich. Comp. Laws § 21.147

Sec. 7. As used in this act: (a) "Commissioner" means the commissioner of the office of financial and insurance services of the department of consumer and industry services. (b) "Deposit" includes the purchase of, or investment in, shares of credit unions. (c) Except as otherwise provided by this subdivision, "financial institution" means a state or nationally chartered bank or a state or federally chartered savings and loan association, savings bank, or credit union whose deposits are insured by an agency of the United States government and which maintains a principal office or branch office located in this state under the laws of this state or the United States. For the purpose of repurchase agreements, "financial institution" means a state or nationally chartered bank or state or federally chartered savings and loan association, savings bank, or credit union whose deposits are insured by an agency of the United States government under the laws of this state or the United States.