This chapter may be amended from time to time at a City Council meeting. An amendment may be initiated by the submission to the City Council of a proposed change by the City Council, the Board of Appeals, an individual owning land in the City to be affected by the amendment, 10 registered voters in the City, the Planning Board and the Metropolitan Area Planning Council. Within 14 days of the receipt of a proposed change, the City Council shall submit it to the Planning Board. A public hearing shall be held by the Planning Board within 65 days after the proposed change is submitted to the Board.