The minutes of the meeting shall reflect all testimony taken, the board's discussion,
[and] state the final decision of the board, the motion and the result of the vote.
A tape recording, or stenotype record if no tape is available, of hearings shall be
made and the tapes retained for one year after final disposition of the case, by the
building safety division. A copy of the minutes shall be delivered to each member
of the board, and the approved minutes shall be signed by the secretary and the chairman.