Mich. Comp. Laws § 38.56: State treasurer; powers and duties.

Sec. 56.

The state treasurer shall administer Tier 2 and shall invest the assets of Tier 2. The state treasurer is the fiduciary and trustee of Tier 2. The state treasurer may appoint an advisory board to assist the state treasurer in carrying out his or her duties as fiduciary and trustee.

The state treasurer shall determine the provisions and procedures of Tier 2 in conformity with this act and the internal revenue code.

The state treasurer has the exclusive authority and responsibility to employ or contract with personnel and for services that the state treasurer determines necessary for the proper administration of and investment of assets of Tier 2, including but not limited to managerial, professional, legal, clerical, technical, and administrative personnel or services.