That is because we have a certain obligation if we are to debate these items. There is no deadline on this type of item. I was told that when there are only three opposition days left... The clerk can explain that better than I can, but we do have an obligation associated with the issue of opposition days, and that has to be debated earlier if we want it to be debated at all.
On May 26th, 2008. See this statement in context.