I can. I mean, Australia is OH&S mad & really full on biosecurity. I do high risk work as a rigger, we need a whole bunch of random OH&S qualification, then on a job, might have rope access gear a bunch of tools, and that's just showing up for a gig. In this case you're talking the same, plus helicopter experience (belaying down), ability to signal and radio with a helicopter, search and rescue qualifications, firefighting experience. Can't imagine that in addition to putting on the harness and kitting up, they had a bit of a spraydown before hand. It would probably be something that kills fungi and bacteria, maybe as simple as tea-tree oil.