Maryland Corporations and Associations Section 2-410
§ 2-410.
  (a)   A director of a corporation who is present at a meeting of its board of directors at which action on any corporate matter is taken is presumed to have assented to the action unless:
    (1)   He announces his dissent at the meeting; and
    (2)   (i)   His dissent is entered in the minutes of the meeting;
      (ii)   He files his written dissent to the action with the secretary of the meeting before the meeting is adjourned; or
      (iii)   He forwards his written dissent within 24 hours after the meeting is adjourned, by certified mail, return receipt requested, bearing a postmark from the United States Postal Service, to the secretary of the meeting or the secretary of the corporation.
  (b)   The right to dissent does not apply to a director who:
    (1)   Voted in favor of the action; or
    (2)   Failed to make his dissent known at the meeting.