If, at the time this code is adopted, the city has a Planning Commission, the Planning Commission for the city is hereby continued. If the city did not have a Planning Commission at the time of the adoption of this code, the City Council may at any time determine to establish a Planning Commission by appointing members to the Planning Commission as provided in § 31.46 of this code. To the extent that any provisions of §§ 31.45 to 31.48 of this code are inconsistent with any provisions of Titles XV or XVII, the provisions of those titles shall prevail. The Planning Commission shall be the city planning agency authorized by M.S. § 462.354(1), as it may be amended from time to time.