Mich. Comp. Laws § 500.225a: Contract for services, supplies, and materials.

Sec. 225a.

The commissioner shall contract for services, supplies, and materials pursuant to Act No. 428 of the Public Acts of 1980, being sections 450.771 to 450.776 of the Michigan Compiled Laws, and pursuant to the competitive bid requirements of the management and budget act, Act No. 431 of the Public Acts of 1984, being sections 18.1101 to 18.1594 of the Michigan Compiled Laws.