I would have to examine the two texts together. They relate to each other, but they're two different things--the text of the recovery act, and the text of the government procurement agreement and the WTO. So I am uncertain about the form of the restriction you're referring to. If it's in the GPA, presumably it doesn't directly affect the guidance they give under the ARRA. So I'd have to examine the text of ARRA before being confident about answering the question.
On October 6th, 2009. See this statement in context.