(a) If five members of the Board are present, the concurring vote of at least four members is necessary to: (1) reverse any order, requirement, or decision of an administrative officer or unit; (2) decide in favor of the applicant on any matter on which the Board is required to act under a local law; or (3) effect any variation in a local law. (b) If four members of the Board are present, the concurring vote of at least three members is necessary to take any action under this section.
Maryland Legal Code