The Small Industries Development Bank of India Act, 1989
9. Vacation and resignation of office by Directors
1. If a Director-
a. Becomes subject to any of the disqualifications mentioned in section 8 or
b. Is absent without leave of the Board for three or more consecutive meetings thereof, His seat shall thereupon become vacant.
2. Any Director may resign his office by giving notice thereof in writing to the authority that nominated him and on his resignation being accepted by such authority or if his resignation is not sooner accepted, on the expiry of three months from the receipt thereof by such nominating authority, he shall be deemed to have vacated his office.