I have been a lotta places where everyone -trucks, houses, planes helicopters all burned Arctic Diesel out of the same bowser.
I'm well aware of what goes on in the back blocks but the OP was asking what is legal. If you say diesel is legal please put up the regulators approval.
I believe Alouette 2s can be run on heating kerosene (according to their PoH), so long as you do something to filter out the excess water.
I believe doesn't cut it, show us the authorities approval. We all know the damn things will run on anything, coal dust slurry if need be, and perhaps wood chips, it just aint legal.