Payment For Goods And Services By Principal Executive Department; Time - Mich. Comp. Laws Section 17.52

Sec. 2.

Unless otherwise agreed in writing, a principal executive department shall take all steps necessary to assure that payment for goods or services is mailed to a private enterprise within 45 days after the principal executive department receives the goods or services, a complete invoice for the goods or services, or a complete contract for goods or services, whichever is later.