5. (1) The President of the Council shall hold office for a term not exceeding three years and not extending beyond the expiry of his term as member. (2) A member, other than an ex officio member, shall hold office for a term of three years from the date of his nomination or election, as the case may be, or until his successor has been nominated or elected: Provided that if such member fails to attend three consecutive meetings of the Council, or remains out of Bangladesh for a continuous period exceeding one year, or ceases to represent the particular interest which he was elected or nominated to represent, his seat shall be deemed to have been vacated and a person shall thereupon be elected or nominated, as the case may be, to fill the vacancy: Provided further that a member shall be deemed to have vacated his seat if he is declared by a competent Court of law to be of unsound mind, or insolvent, or is convicted for a criminal offence involving moral turpitude, including unprofessional and infamous conduct. (3) Where the said term of three years is about to expire in respect of any member, his successor may be nominated or, as the case may be, elected at any time within three months before the said term expires, but shall not assume office until the said term has expired. (4) A member may, at any time, resign his membership by writing under his hand to the President of the Council, and the seat of such member shall be deemed to have fallen vacant from the date of acceptance of his resignation by the President. (5) A casual vacancy in the Council shall be filled through election or nomination, as the case may be, and the person elected or nominated to fill the vacancy shall hold office for the remaining period of the term of his predecessor.