The Mayor may at any time suspend or remove any Commissioner for inefficiency, neglect of duty, malfeasance, misfeasance or nonfeasance in office, incapacity or incompetency, provided however that such suspension or removal shall not be effective without the concurrence of two-thirds (2/3) of the members elected to Council, or until such Commissioner shall have been notified in writing of the charge against him at least ten (10) days in advance of any hearing upon such charge, and he or his counsel has been given an opportunity to be heard, present evidence, or examine any witness appearing in support of such charge.