he's allowed to play until proven guilty of an illegal action, here's the link to a cricinfo article:
http://content.cricinfo.com/ipl2009/...ry/402462.html
he kind of looks like he chucks, i've only really seen him bowl a couple of overs and haven't had good shots of his action in slow-mo so it's a bit tough to tell but usually with his type of action it's pretty tough to be a chucker, especially without getting injured.