+1
even though i am an international student, i see a lot, from malaysia, indonesia, india, with dodgy licences, in malaysia, you can just pay rm600 (aud 170+-) and get your licence, in indonesia, its the same, i'm not sure how it works in india, but there's a classmate who paid money and just got his licence, so just test everyone, those who can drive won't be affected. And those who can't, well, too bad, at least they won't kill someone on the roads. Also, ensure they can all read/speak simple english.