At a minimum Fairfax will retest upon parent request. They might even use an individual test the second time around - definitely get back with them on this, the sooner the better.
Also examples of his work that you feel are above grade level or especially indicative of high potential could be submitted before they make their decision for this year. Have you read their website on their gifted ed. programs? It seems to be a pretty good place to start for retesting or finding out if they will admit the results from the previous test. (that would seem ideal)
