For the purpose of nominating and electing officers and all purposes connected therewith and for the purpose of exercising the powers of the city as provided herein, this Charter shall take effect from the time of its approval by the registered voters in the municipality at the last election of the city. For the purpose of establishing departments, divisions, and officers and distributing the functions thereof, and for all other purposes, it shall take effect on the first day of January, 1966.