This is going to be a bit of a technical answer, but what has to happen is that they have to be licensed to start the commissioning process. When they're in a safe state, they have one kind of licence that is really for while they're being built. Then they came back for six-month licences to allow them to start commissioning. So they would wrap up, percentage-wise, in terms of the power level.
On June 16th, 2009. See this statement in context.