13.—(1) At the first meeting of the Board of the Authority after the revised constitution date the Members shall appoint one of their number to be Chairman and another to be Deputy Chairman whose periods of office shall subsist for one year from their respective appointments.
(2) On the expiry of the respective periods of office of the Chairman and Deputy Chairman, the Board of the Authority shall at the first meeting of the Board following the expiry of said respective periods of office appoint one or two of their number to be Chairman and/or Deputy Chairman as the case may be and he or they shall remain in office as hereinbefore provided.
(3) If the Chairman and Deputy Chairman are ever both absent from any meeting, one of the other Members shall be chosen to be chairman of the meeting. At all meetings the presiding chairman shall, in the case of equality of votes, have a deliberative as well as a casting vote.