Any city, such as described in Kan. Stat. Ann. § 12-631e which has outstanding at the time this act takes effect temporary notes issued in payment of the costs of any construction or reconstruction of sewers such as described in Kan. Stat. Ann. § 12-631e, may pay such temporary notes out of the general fund or by the issuance of general improvement bonds of the city in the manner and subject to the limitations provided in Kan. Stat. Ann. § 12-631e.