Michigan Compiled Laws, Chapter 205. Taxation § 205.30b

Sec. 30b. (1) Within 45 days after the publication of the comprehensive annual financial report by the director of the department of management and budget pursuant to section 494 of the management and budget act, 1984 PA 431, MCL 18.1494, the director of the department of management and budget and the state treasurer shall issue a report regarding the application of the revenue limitation in section 26 of article IX of the state constitution of 1963 to the fiscal year for which the comprehensive annual financial report applies. Within 30 days after the director of the department of management and budget and the state treasurer issue their report, the auditor general shall audit that report. This audit shall examine the past and present methodology of calculating revenues and comment on differences, if any, from past practices.

(2) If a refund is required by section 26 of article IX of the state constitution of 1963, a taxpayer shall petition for the refund by filling out the appropriate line to be provided on the annual income tax return, single business tax return, or Michigan business tax return. The amount of refund shall be based on the tax liability for the taxpayer's year commencing in the state's fiscal year in which the revenue limit was exceeded. Failure to fill out the appropriate line on the annual income tax return, single business tax return, or Michigan business tax return shall not extinguish the taxpayer's right to petition for the refund pursuant to section 350d of the management and budget act, 1984 PA 431, MCL 18.1350d.

(3) If before November 1, 1986, a final determination is made that the method of refund provided for in subsection (2) is unconstitutional, the state treasurer shall cause the refunds due, if any, to be paid for the state fiscal year 1984-85 beginning January 1, 1987 and through February 28, 1987.

(4) The governor may create an escrow account in the general fund and set aside in that account an amount equal to the refunds required by section 26 of article IX of the state constitution of 1963.