The municipality may by ordinance or resolution fix the date, denominations, maturities, rate or rates of interest, redemption terms, registration privileges, manner of execution, signatures required, purchase price, manner of sale, and other requirements for issuing bonds or notes under this chapter. If an official whose signature appears on the bonds or coupons ceases to be an official before delivery of the bonds, the signature of the former official is valid as if the former official had remained in office until delivery.