Maximum
Good post and to the heart of the matter which is prevention based on lessons learned
Of course, when we add in the cultural element to all this, it's not an easy task.
The key is taking responsibility at some level.
If it aint the operator then it needs to be the regulator. If it aint the regulator then it needs to be the public within the country, if it is neither then it needs to be so stated within ICAO