The Council may by a vote of at least two-thirds (2/3) of its members submit proposed amendments to this Charter to a vote of the electors of the Municipality. Upon receipt of petitions, setting forth a proposed amendment to this Charter and signed by at least that number of electors which equals ten percent (10%) of the electors voting at the last preceding general election, the Council shall submit such proposed amendment to a vote of the electors of the Municipality. The submission of any proposed amendment to the electors shall be governed by the requirements of the Constitution of Ohio, and, to such extent as such Constitution shall fail to provide therefor the Council shall determine the manner of such submission. If any such amendment is approved by a majority of the electors voting thereon it shall become a part of this Charter; except that if two (2) or more inconsistent amendments on the same subject are submitted at the same election, only the one of such amendments receiving the largest affirmative vote, not less than a majority of the votes cast upon such amendment, shall become a part of this Charter.