The Council may at any time, by a majority vote of its members, redivide the City into four wards in order to provide substantially equal population in each of the wards and for the purpose of electing ward Council members. All wards shall be bounded, as far as practicable, by county lines, streets, alleys, lot lines, avenues, public grounds, canals, watercourses, municipal corporation lines, center lines of platted streets, or railroads, and shall be composed of adjacent and compact territory, and substantially equal in population. The Council may provide for conducting a census of the population of the City at any time in order to carry out the powers granted by this section. The division of the City into wards under this section shall be effective for the next regular municipal election occurring at least sixty days after the action of the Council and for subsequent elections. The action of Council to redivide the City into wards shall be taken by ordinance, shall become effective immediately upon its passage, and shall not be subject to veto by the Mayor nor subject to referendum.