In the event that the board of directors of a domestic insurer has not adopted emergency bylaws, the following provisions shall become effective upon the occurrence of such a national emergency: (1) Three directors shall constitute a quorum for the transaction of business at all meetings of the board; and (2) Any vacancy in the board may be filled by a majority of the remaining directors, though less than a quorum, or by a sole remaining director. Source: SL 1966, ch 111 , ch 16, § 43 (3).