SECTION 15.  VOTE BY MAYOR; COMMITTEES OF CITY COUNCIL; INTEREST OF  COUNCILMEN.
   The Mayor shall by virtue of his office, preside over the Council, but shall only have a vote in case of a tie.  The committees of the Council shall be selected by the hold-over members of this body and confirmed by Council.
   No member of the Council shall vote on any order, measure, resolution or proposition in which he may be interested otherwise than as a citizen of said City.