Regarding Australia:
Originally Posted by
John Eacott
we now have excellent ones available from a few companies. The best uses a ‘3 ring circus’ of overlapping metal rings to hold the harness strap onto the harness,
I see you posted about that already in 2010.
(Just one update to your understanding: The 'plastic rod' holding the 3-ring, that gets pulled, if it follows skydiving convention, would be a braided steel cable like a control cable, covered in a smooth plastic. So it is quite solid.)
Also popping up in that thread in a later year:
"Three well intentioned cameraman have drowned in last 15 years, trapped by their home made harnesses, 1 x fixed wing 2 x helicopters ( 1 x civilian 1 x military)
In all cases they were the sole occupant who perished."
Rules or common practice here in North American just happen to be less rigorous on the subject of restraints... for now.