law: 4. Vacation of office by existing office bearers.-
  On the appointed day any person who immediately before that day was holding office as a Director of the Central Board otherwise than as Governor or Deputy Governor or as a member of a Local Board of the Bank shall vacate his office, and the Central Board and the Local Boards of the Bank shall thereafter be constituted in the manner prescribed by sections 8 and 9 of the principal Act as amended by this Act. 3