Ala. Code § 10A-2A-8.07: Resignation of Directors.

(a) A director may resign at any time by delivering a written notice of resignation to the board of directors or its chair, to the secretary, or to the corporation.

(b) A resignation is effective as provided in Section 10A-2A-1.41(i) unless the resignation provides for a delayed effectiveness, including effectiveness determined upon a future event or events. A resignation that is conditioned upon failing to receive a specified vote for election as a director may provide that it is irrevocable.