This Charter may be amended in any of the following ways:
11.1.1. 
The County Council may by Ordinance adopted by the affirmative vote of 2/3rds of All Council Votes submit a proposition to amend the Charter to Registered Voters at the next ensuing general election that is not less than 90 days after the vote by the County Council. If the proposition is approved by 4/7ths of the votes cast on the proposition, the proposed amendment is to be deemed adopted and will become effective on the date specified in the proposed amendment.
11.1.2. 
If petitions to amend the Charter that meet the requirements of this Section and bear the signatures of the number of Registered Voters required by this Section are filed with the County Clerk, the proposed amendment must be submitted to Registered Voters at the next ensuing general election that is not less than 90 days after the petitions are filed. If the proposition is approved by 4/7ths of the votes cast on the proposition, the proposed amendment is to be deemed adopted and will become effective on the date specified in the proposed amendment. Petitions proposing an amendment of the Charter must bear the signatures of Registered Voters of Jefferson County totaling at least 10% of the total votes cast for Governor of the State of Missouri in the most recent election at which a Governor of the State of Missouri was chosen. Every petition proposing an amendment of the Charter must contain the full text of the proposed amendment after an enacting clause which reads: "It is resolved by the citizens of Jefferson County that the Jefferson County Charter be amended as follows:"
11.1.3. 
In 2018 and in every tenth year thereafter, the County Council may by Ordinance by the affirmative vote of 2/3rds of All Council Votes submit a proposition to Registered Voters at the next ensuing general or special election to appoint a Charter Amendment Commission to recommend amendments to the Charter or repeal of the Charter. If the proposition is approved by 4/7ths of the votes cast on the proposition, a Charter Amendment Commission is to be appointed before February 1st of the year following the election as provided in Article VI, Section 18(G) of the Missouri Constitution for appointment of charter commissions. Members of the Charter Amendment Commission who die, resign, or are otherwise unable to serve are to be promptly replaced by the same appointing authority. Members of the Charter Amendment Commission are not to receive compensation, but the expenses of the Charter Amendment Commission that are necessary for it to perform its duties are to be paid by the County. The Charter Amendment Commission must present either a replacement Charter or proposed amendments of this Charter, or a statement that no amendments are necessary, signed by at least 2/3rds of its members, to the County Council on or before the August 31st following its appointment. On that date, the Charter Amendment Commission is to be deemed dissolved. If the Charter Amendment Commission has presented either a replacement Charter or proposed amendments of this Charter, the County Council must by Ordinance submit the proposition to replace or amend the Charter to Registered Voters at the first general election following its presentment by the Charter Amendment Commission. If the proposition is approved by 4/7ths of the votes cast on the proposition, the proposed replacement or amendment is to be deemed adopted and will become effective on the date specified in the Ordinance.
This Charter may be repealed by any of the methods by which it may be amended. If repeal of this Charter is so approved, the repeal is to become effective on the first day of the calendar year following the election at which the repeal proposition was adopted.