Michigan Compiled Laws, Chapter 208. Business Tax § 208.1410a

Sec. 410a. (1) For tax years that begin on or after January 1, 2008 and end before January 1, 2013, an eligible taxpayer may claim a credit against the tax imposed by this act equal to the following:

(2) As used in this section, “eligible taxpayer” means a taxpayer that is, collectively or individually, including through affiliated companies, an owner, operator, manager, licensee, lessee, or tenant of more than 1 facility or stadium in this state, including grounds and ancillary facilities, that has a capacity of at least 14,000 patrons per facility and is primarily used for professional sporting events or other entertainment, and that has made a capital investment of not less than $250,000,000.00, collectively or individually, including through affiliated companies, into the construction cost of a facility or stadium for which the taxpayer qualifies for this credit.