A new addition to the 10, 5, 1 system.
At the announcement of '3 Minutes' one person from each room must stand against the door at ease, while the rest of the occupants must sit on their stools (also at ease)
Come the '2 minute' mark everyone, standing or sitting, must now be doing so at attention. Feet together, hands in fists, and if you are sitting your arms must be streched out straight with your fists on your knees.
Then at one minute, lights are turned off and everyone is in a line at the door in asento (attention).