My understanding is that the minimum income must be paid from a pension each year and be taxed accordingly. I do remember reading something about a potential scheme to allow as a lump sum but I think you needed to apply to ATO for a ruling or something crazy.
Over this lumpsums should be OK, so long as not a T2R pension etc.
Get the advice from an expert, not a forum, in this case. Cheers
DYOR
