(1) In any suit, action, or proceeding involving the validity or enforcement of or relating to any contract of the authority, the authority shall be conclusively deemed to have been established in accordance with the provisions of this part upon proof of the issuance of the aforesaid certificate by the secretary of state.
(2) A copy of such certificate, duly certified by the secretary of state, shall be admissible in evidence in any such suit, action, or proceeding and shall be conclusive proof of the filing and contents thereof.