Upon delivery to the city election authorities of the report of a charter commission pursuant to section 8.01(c) or delivery by the city clerk of an adopted ordinance proposing an amendment pursuant to section 8.01(b) or a petition finally determined sufficient to propose an amendment pursuant to section 8.01(d), the election authorities shall submit the proposed amendment to the voters of the city at an election. Such election shall be announced by a notice containing the complete text of the proposed amendment and published in one (1) or more newspapers of general circulation in the city at least 30 days prior to the date of the election. If the amendment is proposed by petition, the amendment may be withdrawn at any time prior to the thirtieth day preceding the day scheduled for the election by filing with the city clerk a request for withdrawal signed by at least two-thirds of the members of the petitioners’ committee. The election shall be held not less than 60 and not more than 120 days after the adoption of the ordinance or report or the final determination of sufficiency of the petition proposing the amendment. If no regular election is to be held within that period, the city council shall provide for a special election on the proposed amendment; otherwise, the holding of a special election shall be as specified in the state election law.