Colorado Revised Statutes Title 31. Government Municipal § 31-21-212. Registration of refunding bonds

Whenever any municipality issues refunding bonds under the provisions of this part 2, the governing body shall direct that the clerk of said municipality, as a part of said clerk's duties, register said bonds in a book to be kept by him for that purpose, and, when so registered, the legality thereof shall not be open to contest by such municipality, or by any other person or corporation in behalf of such municipality for any reason whatever. It is the duty of the clerk to register said bonds, noting the principal amount, the date of issuance and maturity, and the rate of interest of said bonds.