National Assembly has been suspended by the military so they will have trouble meeting.
> Following Yoon’s announcement, South Korea’s military proclaimed that parliament and other political gatherings that could cause “social confusion” would be suspended
They're apparently (according to BBC) inside the building now anyway and waiting for the speaker to arrive and call a vote. Also special forces are there and landed helicopters on the roof, intent unclear.
Edit: vote complete, declaration of martial law is voted down. Now what?