Mich. Comp. Laws § 259.820

Sec. 20. All contracts and rental agreements between the state aeronautics commission, the terminal building board of control and contracting parties relevant of space, services, facilities or business enterprises in existence at the time of the formation of the authority shall be transferred to the authority and all terms and conditions of the contracts and agreements shall be continued until terminated or renegotiated by the terms of the contracts and agreements.