All powers of the City shall be vested in the Council and Mayor, except as otherwise provided by law or this Charter, and the Council and Mayor shall provide for the exercise thereof and for the performance of all duties and obligations imposed on the City by law. Council and the Mayor shall and may only act in all matters as a body, and only act upon a quorum vote in a duly noticed public meeting. Council members not serving as Chair of a subordinate Commission or Committee of Council may not, without authority delegated by public vote of a quorum of Council, seek to influence or otherwise interfere with the authorized official acts of the Mayor, City Manager or any other officer or employee of the City.