Whenever there shall be a change in population in any of the districts heretofore established, evidenced by a federal decennial census of population published following the last federal census of population preceding the adoption of this chapter, there shall be a reapportionment of the commission districts in the manner hereinafter provided:
(1) The mayor and commissioners shall within six months after the publication of each federal census of population for the city, following the last federal decennial census of population preceding the adoption of this chapter, or if within six months after there shall have been any change in the corporate limits of the city, file with the commission a report containing a recommended plan for reapportionment of the commission district boundaries to comply with the following specifications:
a. Each district shall be formed of contiguous, and to the extent reasonably possible, compact territory, and its boundary lines shall be the center lines of streets or other well-defined boundaries.
b. Each district shall contain as nearly as is practicable the same population.
(2) The report shall include a map and description of the districts recommended and shall be drafted as a proposed ordinance and considered by the commission as other ordinances are considered. Input shall be solicited from the community.
(3) The commission shall enact a redistricting ordinance within six months after receiving such report.