Scrub python, olive python and oenpelli. Olive is class 1, scrubby is class 2 and you will most likely never see oenpelli on a licence.
All grow 12ft plus, scrubs reportedly to over 20ft, but I think Brian Barnett has one of the largest srcubbies in captivity which is around 18 or 19 ft from memory.
Biggest olive I have ever seen was 14 ft and 30odd kilos