6B. (1) The members specified in clause (h) of section 6A (1) shall hold office for a period of three years from the date of their nomination: Provided that such members may resign their membership in writing addressed to the Chairman. (2) A person shall cease to be a member, if he-(a) dies; or(b) being a member specified in clause (h) of section 6A (1)-(i) resigns his membership under the proviso to sub-section (1) of this section ; or(ii) his tenure expires under sub-section (1) of this section ; or (iii) remains absent, without permission of the Chairman, from three consecutive meetings of the Board; or (c) is declared by a competent Court to be of unsound mind; or (d) is an undischarged insolvent; or (e) has been, on conviction for a criminal offence involving moral turpitude, sentenced to imprisonment for a term of not less than three months or to a fine not less than five thousand taka and unless a period of two years has elapsed since his release or realisation of the fine, as the case may be, a person so sentenced shall not be eligible to be a member.]