This article shall, without reference to any other statute or charter provision, be deemed full authority for the acquisition, construction, establishment, extension, equipment, additions, betterment, improvement, repair, maintenance and operation of or to a waterworks or electric power system or for the construction of any additions, betterments, improvements, repairs, maintenance or operation of or to an existing electric power system as herein provided and for the issuance and sale of the bonds or the alternative methods of financing by this article authorized, and shall be construed as an additional and alternative method therefor and for the financing thereof, and no petition, referendum or election or other or further proceeding with respect to any such undertaking or to the issuance or sale of bonds or the alternative methods of financing under the provisions of this article and no publication of any resolution, ordinance, order, notice or proceeding relating to any such undertaking or to the issuance or sale of such bonds or the alternative methods of financing shall be required, except as prescribed by this article, any provisions of other statutes of the state to the contrary notwithstanding: Provided, That all functions, powers and duties of the state division of health shall remain unaffected by this article.

This article shall be construed as cumulative authority for any undertaking herein authorized, and shall not be construed to repeal any existing laws with respect thereto.