The changes have all been made in what would be called the chapeau of (5.1). The rest of the definition is identical to what it was. It turns out there's a really technical reason that it actually can't be done as a definition because of one of those time periods in the regulations. I don't fully understand it, but this is what I've been told by the Department of Justice.
On April 21st, 2009. See this statement in context.