The governing body may provide by said ordinance authorizing the issuance of the bonds or in the trust indenture hereinafter referred to, that additional bonds may thereafter be authorized and issued, at one time or from time to time, under such limitations and restrictions as may be set forth in said ordinance and/or trust indenture, for the purpose of extending, improving or bettering the works when deemed necessary in the public interest, such additional bonds to be secured and be payable from the revenues of the works equally with all other bonds issued pursuant to said ordinance without preference or distinction between any one bond and any other bond by reason of priority of issuance or otherwise.