Mich. Comp. Laws § 110.14
After the passage of the annual appropriation bill, no further sums shall be used, raised or appropriated; nor shall any further liability be incurred for any purpose, to be paid from any general fund or street district fund, during the fiscal year for which the appropriation was made, unless the proposition to make the appropriation shall be sanctioned by a 2/3 vote of the electors voting upon the proposition at the next annual city election or at any special election called for that purpose. But this section shall not prohibit the council from making any necessary repairs or expenditure at a cost not to exceed 5,000 dollars, the necessity for which is caused by casualty or accident, happening after making the annual appropriation for the year or such necessity arising from an existing, evident and impending danger, and from borrowing the money therefor.
MCL 110.14