As i see this,if you have a "youth mobility visa" or "holiday visa" as some call it,you cant ride in the NDL.proved by tyson nelson
other option is a full blown "work permit",which again i believe you cant use in the NDL [eg Kurt Sheilds couldnt ride in NL], but is fine for PL and EL as the permit permits the said person to earn on a professional basis
If, as i read it,and have been told is true ,does that make a problem with Dyer,Kurtz etc?