Mich. Comp. Laws § 207.11
On the third Monday in May in each year, the state board of assessors shall meet at its office in the city of Lansing and continue in session from day to day for as long as necessary, but not later than June 15, to review the assessment roll. Any interested company or person may appear during that period and be heard as to the true cash value or taxable value of the property of any company assessed. The state board of assessors may, on application or on its own motion, correct the true cash value or taxable value of the property assessed. To determine the true cash value or taxable value of the property assessed, the state board of assessors may subpoena witnesses as provided in section 3 and may hold any hearing it considers necessary. If the property of a company subject to taxation under this act has been omitted from the assessment roll, the state board of assessors shall place that property on the assessment roll and assess the property as required in sections 9 and 10. An assessment under this section shall not be made if there are less than 5 days before the completion of the review. After the state board of assessors completes the review of the assessment roll, it shall place opposite each description of property in the assessment roll, in a column provided for that purpose, the true cash value and taxable value of that property as determined by it. The taxable value determined by the state board of assessors is the final valuation on which the tax on that property shall be levied and spread. After the state board of assessors completes its review of the assessment roll, a majority of the state board of assessors shall certify that the assessment roll has been acted upon and reviewed in accordance with this act, shall state all of the alterations, changes, corrections, and additions made to the true cash value or taxable value of the property on the assessment roll, shall state all the alterations, changes, and corrections made in the true cash value or taxable value of the property of the state other than that included in this act on which ad valorem taxes are assessed for state, county, township, school, and municipal purposes for the current year, and shall also state all of the alterations, changes, and corrections made in computing the average rate as provided in this act.
MCL 207.11