SECTION 17. ORDINANCES INITIATED BY ELECTORS; PUBLIC VOTE; PUBLICATION.
      Any proposed ordinance may be submitted to the Council by petition signed by ten percent of the qualified voters of the City. Such petition shall be conformed as provided by Section 81 of this Charter, and shall be submitted, examined and certified in the manner provided in Section 81 . If the petition be certified to Council as provided in Section 81 of this Charter, and contains a request that the ordinance be submitted to a vote of the people if not passed by the Council, the Council shall either (a) pass such ordinance without alteration within twenty days after attachment of the Clerk's certificate of sufficiency to the petition; or (b) forthwith after the Clerk shall attach to the petition a certificate of sufficiency, the Council shall call a special election, unless a general election is to be held within ninety days thereafter, and at such special or general municipal election such ordinance shall be submitted without alteration to the vote of the electors of the City. If a majority of the votes cast be in favor thereof, such ordinance shall thereupon become a valid and binding ordinance of the City, and any ordinance proposed by petition, or which has been adopted by a vote of the people, shall not be repealed or amended except by a majority vote of the people. Any number of proposed ordinances may be voted upon at the same election. In accordance with the provisions of this section, but there shall not be more than one special election in any period of six months for such purpose.
   Whenever any ordinance or proposition is required by this Charter to be submitted to the voters of the City at any election, the City Clerk shall cause such ordinance or proposition to be published once in two daily newspapers published in the City, such publication to be not more than twenty days or less than fifteen days before such election.