It is very new. We started the reflection on the need to make the shift about 10 years ago, in the mid-1990s, when we were seeking ways to improve safety. We started to implement it through various regulatory measures about five or six years ago: in 2001 in rail; in aviation it's more recent. The conversation or dialogue with the stakeholders and all the parties affected has been going on for many years, but the first regulation in aviation came a little over a year ago.
On June 15th, 2006. See this statement in context.