The governing body of a home rule county may issue negotiable coupon bonds, to be denominated refunding bonds, for the purpose of refunding any of the bonded indebtedness of the county whether due or not, or which has or may become payable at the option of the county or by consent of the bondholders, or by any lawful means, whether such bonded indebtedness is existing on or is created on or after June 8, 1981. The amount of such refunding bonds to be issued under the provisions of this part 7 shall first be determined by the governing body, and a certificate of such determination shall be made and entered in and upon the records of the county prior to the issuance of said refunding bonds.