D.C. Mun. Regs. tit. 19, r. 19-3506
The Council's members shall hold not less than nine (9) regular meetings per fiscal year, except that it shall hold its annual meeting during the month of October.
Special Meetings of the Council's members may be called by the Chairperson on his or her own initiative and shall be called by the Chairperson at the request of one- third of the Council's Board or at the request of twenty (20) members of the Council.
Notice of the date, time, and place of each meeting of the NPC members and, in the case of a special meeting, of the purpose or purposes for which the meeting is called, shall be given to NPC members at least five (5) days prior thereto and said notice shall be posted in NPC headquarters and, whenever possible, all mass media used.
D.C. Mun. Regs. tit. 19, r. 19-3506