Mich. Comp. Laws § 450.186a

Sec. 186a. Any number of persons, not less than 3, may become incorporated as a public building corporation for the purpose of constructing, operating and maintaining office buildings and other facilities for the use of the state of Michigan. No contract or contracts between the state administrative board and any public building corporation shall become effective until approved by the legislature by concurrent resolution. Such corporations are hereinafter called public building corporations.