Any action taken by such municipal corporation under the provisions of this chapter or relating to the matters therein set forth, may be taken by vote of the legislative body of such municipal corporation, excepting the issuance of bonds and, in municipalities wherein such body is not otherwise given the power to levy taxes, the levying of a tax under section 3613 of this title; provided, however, that no action shall be taken hereunder unless the construction of a sewage disposal plant shall have first been authorized by majority vote of the legal voters of such municipal corporation attending a meeting duly warned and holden.