Review by Planning Commission. All amendments to this chapter must be reviewed by the City Planning Commission. Amendments may take the form of a City Council proposal, staff-initiated recommendations or citizen petitions, for either zoning text or zoning district boundary changes. In any event, the Planning Commission shall hold a public hearing as provided in Act No. 207 of the Public Acts of Michigan of 1921 (MCL 125.581 et seq., MSA 5.2931 et seq.), as amended. After the public hearing has been closed, the Planning Commission shall submit a report and recommendations to the City Council on the proposed change.