District of Columbia Code Division V. Local Business Affairs § 29-406.23. Waiver of notice.

(a) A director may waive any notice required by this chapter, the articles of incorporation, or the bylaws before or after the date and time stated in the notice. Except as otherwise provided in subsection (b) of this section, the waiver shall be in the form of a record, signed by the director entitled to the notice, and filed with the minutes or corporate records.

(b) A director's attendance at or participation in a meeting shall waive any required notice to the director of the meeting, unless the director at the beginning of the meeting, or promptly upon arrival, objects to holding the meeting or transacting at the meeting and does not thereafter vote for or assent to action taken at the meeting.