The officers of the Winooski School District, except the Collector, shall be a Board for the Abatement of District Taxes, and it shall have the same power which the Board for abatement of town taxes has in the abatement of such taxes. The Trustees of the District, on request of the Collector, shall call a meeting of such Board on or before January 15 in each year, by posting a notice thereof in three public places in such District at least five days before such meeting.