Unless the Council shall, by an affirmative vote of four (4) or more members, determine that the best interests of the city shall be served and the party considered by such a vote has met requirements for such a classified position as are specified by Council, the following relatives of any elective or appointive officer are disqualified from holding any appointive office or employment during the term for which said elective or appointive officer was elected or appointed: spouse, child, parent, grandchild, grandparent, brother, sister, half brother, half sister, or the spouses of any of them. This shall in no way disqualify such relatives or their spouses who are bona fide appointive officers or employees for the city at the time of the election or appointment of said official.