There shall be three voting districts for the City, which shall be defined and filed with the City Clerk. The City Council may make changes from time to time to the boundaries of the districts in order to provide an equal division of population among them in accordance with U.S. Census data. Voting district changes shall not be made more frequently than once in five years. Such changes shall be approved by the voters at an annual or special meeting of the City and shall become effective immediately upon approval unless a later date is established therein. (Amended 2013, No. M-19 (Adj. Sess.), § 2, eff. May 20, 2014.)