Powers granted by article shall be cumulative

The powers and authorizations hereby conferred upon the commissions shall be in addition to all other powers and authorizations previously vested in such commissions, and may be availed of pursuant to action taken at any regular or special meeting of the commission by a resolution to take effect immediately upon its adoption, nor shall the publication of any ordinance or resolution providing for the issuance of any bonds under this article be required other than as provided herein.