Sing ATP
Take a look at the CAAS webpages. There will be plenty of info on the exams, but be careful and read the latest circulars. There have been a few unwritten rules in Singapore that have now been formalised. Basicaly you need ATP Air Law and 3000hrs in commercial or like operations. The Authority will need you logbook (they like to hold on for a bit, certified copy no good) then they descide. Air Law is a pain, not overly hard but there are still questiond on airships.