Mich. Comp. Laws § 18.1283a

Sec. 283a. (1) Except as otherwise provided in this subsection, beginning October 1, 2005, all nonclassified state government employees payroll and payments and all elected and appointed state officials payroll and payments shall be paid by electronic funds transfer. The department of community health and the family independence agency shall implement this section October 1, 2006. (2) Except as otherwise provided in this subsection, beginning October 1, 2005, all contracts that this state enters into for the purchase of goods or services shall provide that payment shall be made by electronic funds transfer. The department of community health and the family independence agency shall implement this section October 1, 2006. (3) The department is encouraged to implement this section before October 1, 2005.