Mich. Comp. Laws § 18.1241a
The department shall require that each contract entered into for construction, alteration, repair, or rebuilding of a state building or other state property contain a clause requiring that of the persons working on a project and employed by the contractor or subcontractor of the contractor, not less than 50% shall have been residents of this state for not less than 1 year before beginning work, except that the percentage shall be reduced or the clause omitted to the extent that residents are not available or to the extent necessary to comply with a federal law or regulation concerning federal funds used for the project. A breach of the clause shall be considered a material breach of the contract. This section shall not apply to employers who are signatory to collective bargaining agreements and which agreements allow for the portability of the employees on an interstate basis.
MCL 18.1241a