Michigan Compiled Laws, Chapter 18. Department of Management and Budget § 18.1455

Sec. 455. (1) The appropriations made under a budget act for unclassified positions as specified by a line item appropriation shall only be used for those positions.

(2) Incumbents of unclassified positions in the executive branch of state government, the legislative auditor general's office, and judicial officers whose total compensation is payable by the state and who are not eligible to receive additional compensation from a county, township, or municipal governmental unit of this state pursuant to the state constitution of 1963 or state law, are eligible to participate in the state contributory insurance and longevity programs on the same basis as classified employees. Prior years' service as a classified employee shall be included in determining the amount of the longevity payment.

(3) The appropriations for salaries and wages shall be used only with respect to classified positions established by the civil service commission and to special personal service employees hired with approval of the department of civil service. Money appropriated in a budget act shall not be used to pay back salaries or wages to an employee, except for the purpose of paying appropriately authorized retroactive gross pay adjustments to an employee with an effective date prior to October 1 of the fiscal year in which the approval was given.