Recommendations for revision or amendments of the zoning ordinance, including addition to or change in classification of uses, and including the Zoning District Map, may also be made by the Commission upon its own motion for final determination by the Board; likewise, the Board may revise, modify or amend the zoning ordinance, including the Zoning District Map, upon its own motion; provided however, that such proposed changes shall first be submitted to the Commission for recommendations and report. In that case, final action thereon shall be taken only upon notice and hearing, as provided herein.