That's the announcement that I thought was going to kill my trial.
Are there stands where spectators huddle together?
Are there points where spectators huddle together?
Are there pits where participants can't distance?
What is the expected attendance?
There is a common sense vs thing law with taming this animal. Ten people is the maximum indoor body count but what would be safer, ten people in an average rec room or eleven that got together and rented a hockey arena for a skate?
The logistics of calculating air volume and respiration rates for every structure and person isn't realistic so a broad brush is applied.
Outdoors, a still valley or a windy hilltop?