Mich. Comp. Laws § 388.1764c

Sec. 164c. A district or intermediate district shall not use funds appropriated under this act to purchase foreign goods or services, or both, if American goods or services, or both, are available and are competitively priced and of comparable quality. Preference shall be given to goods or services, or both, manufactured or provided by Michigan businesses if they are competitively priced and of comparable quality. In addition, preference should be given to goods or services, or both, that are manufactured or provided by Michigan businesses owned and operated by veterans, if they are competitively priced and of comparable quality.