Ultralight aircrafts are considered as sport devices..so flying this machine is considered as a sport!!
I think that a very good interpretation as they are not able to be registered in the commercial work class in this country at least as far as I understand it.
Like most extreme sports bob sledding etc., I wonder how does one's personal Life insurance validation go if one was to "fall", while playing this particular sport? In that query I include for medical expenses under workman's compensation and also for a passenger, who may think everything is honky-dory until the bill is presented for payment, or their spouse / beneficiary is looking for the entitlements?
cheers tet.
P.S. These gadgets are universally disliked by every AOC operator in the Northern Territory. One CP told me he looked at one for a few days, and, was almost tempted to go for a spin, but bailed when he was about to lift his foot over the sill.