It's been noted, I think by a private tax practitioner in the press, that these rules have been in place for about 35 years. I think the emergence of double-dips didn't occur the very first day. During the 1980s, largely, is when they started to take hold, and they've probably been the subject of commentary since then. As we know, and as I mentioned earlier, the 1992 report by the Auditor General identified an issue with them. So we have had it at least since that point in time.
On May 15th, 2007. See this statement in context.