Vacation of seat as member and filling up of the vacancy

1) A member of the Council shall be deemed to have vacated his seat : (a) On sending his resignation in writing to the President. (b) On his absence from three consecutive meetings of the Council without its permission. (c) On removal of his name from the register. (d) On his being declared an insolvent by any competent court or on his becoming insane. (e) On expiry of his term as member. (f) On his absence out of India for six consecutive months without prior intimation to the Council. 2) A casual vacancy in the Council shall be filled up by nomination or election, as the case may be, and the person nominated or elected to fill the vacancy shall hold office only for the remaining part of the term for which the member whose place he takes over was nominated or elected.