Section 70 ILCS 5/2.7 - Metropolitan Airport Authority(a) Upon the effective date of this amendatory Act of 1986, in any county with a population between 600,000 and 3,000,000 and contiguous to a county with a population in excess of 1,000,000 inhabitants, a Metropolitan Airport Authority is hereby established, the territory of which shall include all of the territory within the corporate limits of the county and the territory of any pre-existing authority located partly within and partly outside the county, except the territory of any municipality whose territory lies both inside and outside the county with the majority of the territory lying outside the county. Upon that date, the Metropolitan Airport Authority shall be deemed an organized Airport Authority under this Act. Within 30 days after the initial appointments have been made under Section 3.4, the Authority board shall notify the office of the Secretary of State of the establishment of the Metropolitan Airport Authority by this amendatory Act of 1986, who shall thereupon issue a certificate of incorporation to the Authority.(b) If all of the airport facilities of an existing Airport Authority are situated within the corporate limits of a county in which a Metropolitan Airport Authority is established, the existing Airport Authority shall be dissolved upon the establishment of the Metropolitan Airport Authority. In such event the rights to all property and all assets and liabilities, including bonded indebtedness, of the existing Airport Authority shall be assumed by the Metropolitan Airport Authority. P.A. 91-618, eff. 1/1/2000.