Mich. Comp. Laws § 208.153: Affirmation of existing tax liabilities.

3. Affirmation of Existing Tax Liabilities

Sec. 3. Except as specifically provided, this initiated law shall not affect the administration, allocation, or apportionment of the tax; payments to counties; nor any appropriation. The obligation of taxpayers and the state for taxes levied or collected on business activity on or before December 31, 2007 is affirmed.