The Council, may by affirmative vote of two-thirds of the members elected to Council, submit any proposed amendment to this Charter or a revised or amended Charter to the electors; or, upon receipt of a petition signed by not less than ten (10) percent of the total electors voting at the last regular municipal election setting forth any proposed amendment to this Charter or a revised or amended Charter, it shall submit such proposed amendment to the electors. Such amendment or revised or amended Charter shall be submitted at the next regular municipal election provided said election shall occur not less than sixty (60) nor more than one hundred-twenty (120) days after receipt of said petition. In other instances, Council may, by vote of two-thirds (2/3) of the members elected to Council, provide for a special election, provided also that said special election shall occur not less than sixty (60) nor more than one hundred-twenty (120) days after receipt of said petition. Not less than fifteen (15) days prior to such election, the Clerk of the Council shall cause a copy of the proposed amendment or revised or amended Charter to be published in a paper of general circulation once a week for two (2) consecutive weeks. If any such proposed amendment shall be approved by a majority of the electors voting thereon, it shall become a part of this Charter; except that, if two or more inconsistent proposed amendments on the same subject are submitted at the same election, only one of such amendments receiving the largest affirmative vote, not less than a majority, shall become a part of this Charter.