If Council shall fail to pass an ordinance proposed by initiative petition, or shall pass it in a form different from that set forth in the petition therefor, or if Council fail to repeal a referred ordinance, the proposed or referred ordinance shall be submitted to the qualified electors not less than thirty days nor more than one year from the date Council takes its final action thereon, but if no regular election is to be held within such period, Council shall provide for a special election to be held within ninety days from the date on which Council took its final action thereon.