This excerpt taken from the ABII 10-Q filed Dec 20, 2007.
Section 3.3 Vacancies.
Unless otherwise provided in the Certificate of Incorporation, any vacancies, and any newly created directorships resulting from any increase in the authorized number of directors, may be filled by the affirmative vote of a majority of the directors then in office, even though less than a quorum of the Board of Directors, or by a sole remaining director. Each director so elected shall hold office for the unexpired portion of the term of the director whose place shall be vacant, and until his successor shall have been duly elected and qualified. A vacancy in the Board of Directors shall be deemed to exist under this Section in the case of the death, removal or resignation of any director, or if the stockholders fail at any meeting of stockholders at which directors are to be elected (including any meeting referred to in Section 3.4 below) to elect the number of directors then constituting the whole Board.