[Edi]

If an event can't happen but an event is called, another event happens instead.

The scale restrictions are always the minimum scales of that type for the event. So turmoil 1 means turmoil 1 or more. Death 0 means death 1, 2 or 3 OR neutral scales, but can't happen if there is growth. Most of that is laid out in the Dom3 Events List thread (see my sig).