Mich. Comp. Laws § 141.914a
If a special census of a city, village or township that levied at least 1 mill local property tax in the preceding calendar year is determined to meet the requirements of section 7, the department of management and budget, during July, 1976 and each July thereafter, shall cause to be paid as a supplemental payment to the city, village or township its proportionate share of the amount available for this purpose, the share to be determined by multiplying the aggregate per capita amount of payments it received under sections 12, 13, 14 and 15 for the preceding July 1 to June 30 payment period by its excess increase in population determined under section 7. The amount necessary to provide the distribution required by this section is appropriated each fiscal year from the state general fund.
MCL 141.914a