Section 105A(b) in West Bengal Co-operative Societies Rules, 2011
(b)Central Societies(i)The Chairman and the Vice-Chairman, or in their absence, two Directors of the concerned society as decided by its board;(ii)A nominee of the Registrar;(iii)The Chief Executive Officer of the concerned Co-operative society or the Manager as the board of the society may decide;(iv)A representative of the concerned apex society;(v)One expert selected by the Society