The Board of Tax Appeals shall meet at least one (1) day in each month, or more frequently if called by the chairman of the board, at such place as may be designated by the chairman, for the purpose of hearing and considering matters necessary to facilitate the performance of its duties. Any two (2) members of the board shall constitute a quorum, and if two (2) members be unavoidably absent, such fact shall be noted on the minutes and all matters for consideration shall be continued to the next meeting.