The regulations, restrictions, prohibitions and limitations imposed, and the district boundaries created may from time to time be amended, supplemented, changed, modified or repealed by ordinance, but no change shall be made until the planning commission, after notice and public hearing, files with the city a report and recommendation on the proposed change. In addition to the procedural provisions hereinafter set out, the planning commission shall adopt procedural rules for the conduct of its public hearings. (Ord. 1953, 2010)