Whether in fact it was part of the licence. There were two pumps. The backup system was being maintained. It could operate with one of the pumps that had 100% design capacity. In other words, if it actually got to the point where you needed the third backup system, one of the pumps would be able to handle 100% of the capacity. It is important to stress that they didn't even have one pump prior to November 18.
On January 16th, 2008. See this statement in context.