You need to submit all test scores from IQ and achievement tests he has taken, and at least one of the tests has to be from within the last two years. I would go ahead and submit. You might get in, or they might ask for more information. I doubt that they'll reject it out of hand, although I don't work for DITD and can't speak for them. I don't see any harm in submitting it - it doesn't take much time if you're not doing it on the basis of portfolio items.