Amendments to this charter may be proposed:
(1) 
By ordinance of the assembly containing the full text of the proposed amendment, or
(2) 
By report of an elected charter commission created by assembly ordinance or by initiative ordinance, or
(3) 
By initiative petition.
Proposed amendments shall be submitted to the qualified voters of the municipality at the next regular or special election occurring more than forty-five days after the adoption of the ordinance, the final report of the charter commission, or certification of the initiative petition. A notice containing the full text of each proposed amendment shall be published.
If a majority of the qualified voters voting on a proposed amendment approve, the amendment shall become effective at the time fixed therein or, if no time is so fixed, thirty days after certification of the election.