(1) The incorporation agreement of any authority may be amended in the manner provided in this section. The board of the authority shall first adopt a resolution proposing an amendment to the incorporation agreement. The amendment shall be set forth in full in the resolution and may include any matters which might have been included in the original incorporation agreement.

(2) After the adoption of the resolution by the board, the chairman of the board and the secretary of the authority shall file a certified copy of the resolution and a signed written application in the name of and on behalf of the authority, under its seal, with the governing body of each member, requesting the governing body to adopt a resolution approving the proposed amendment. As promptly as may be practicable after the filing of the application with the governing body, that governing body shall review the application and shall adopt a resolution either denying the application or authorizing the proposed amendment. Any such resolution shall be published in a newspaper or newspapers as provided in subsection (4) of Section 17-17-309. The governing body shall cause a copy of the application and all accompanying documents to be spread upon or otherwise made a part of the minutes of the meeting of the governing body at which final action upon the application is taken. The incorporation agreement may be amended only after the adoption of a resolution by two-thirds (⅔) of the governing bodies of the members. Publication of such amendment shall be made as provided in subsection (4) of Section 17-17-309.

(3) Within forty (40) days following the adoption of the last adopted resolution approving the proposed amendment, the chairman of the board and the secretary of the authority shall sign, and file for record in the office of the chancery clerk with which the incorporation agreement of the authority was originally filed and the Secretary of State, a certificate in the name of and in behalf of the authority, under its seal, reciting the adoption of the respective resolutions by the board and by the governing body of each member and setting forth the amendment. The chancery clerk for such county shall record the certificate in an appropriate book in his office. When such certificate has been so filed and recorded, the amendment shall become effective. No incorporation agreement of an authority shall be amended except in the manner provided in this section.

(4) Any member of a regional solid waste management authority may withdraw from the authority by submitting a resolution to the board requesting an amendment to the incorporation agreement pursuant to subsection (1) of this section. Upon compliance with the requirements of subsections (1) through (3) of this section and the payment of its pro rata share of any indebtedness, costs, expenses or obligations of the authority outstanding at the time of withdrawal, the amendment may become effective upon adoption of the resolution by the board. The withdrawal of a member shall not operate to impair, invalidate, release or abrogate any contract, lien, bond, permit, indebtedness or obligation of the authority, except to relieve the withdrawing member from further financial obligation to the authority.

(5) After the issuance of a permit by the permit board for the construction and operation of a solid waste landfill, any withdrawal of the situs county from the authority shall not affect the ability of the authority to operate a solid waste landfill upon the site for which the permit has been issued.