The Council may remove the Mayor for gross misconduct, or malfeasance, misfeasance or nonfeasance in or disqualification for office, or for the conviction while in office of a crime involving moral turpitude, or for a violation of his/her oath of office; provided, however, that such removal shall not take place without the concurrence of two-thirds (2/3) of the members elected to Council nor until the Mayor shall have been notified in writing of the charge against him/her at least ten (10) days in advance of a public hearing upon such charge, and he/she or his/her counsel has been given an opportunity to be heard, present evidence, or examine any witnesses appearing in support of such charge.