The Council shall be the judge of the election and qualifications of its own members. It may expel or remove any member for gross misconduct, or malfeasance 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 oath of office, or persistent failure to abide by the rules of the Council, or the absence without justifiable excuse from three consecutive regular meetings of the Council; provided, however, that such expulsion shall not take place without the concurrence of two-thirds (2/3) of the members of Council nor until the accused member 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.