Maryland Code, Corporations and Associations § 2-409

(b)(1) Notice of each meeting of the board of directors shall be given as provided in the bylaws.

(2) Unless the bylaws provide otherwise, the notice:

(1) Before or after the meeting delivers a written waiver or a waiver by electronic transmission which is filed with the records of the meeting; or

(2) Is present at the meeting.

(d)(1) Unless restricted by the charter or bylaws of the corporation, members of the board of directors or a committee of the board may participate in a meeting by means of a conference telephone or other communications equipment if all persons participating in the meeting can hear each other at the same time.

(2) Participation in a meeting by these means constitutes presence in person at the meeting.