In Australia, at least as far as I understand it (not a lawyer), the standard is enforceable for ‘Class 3’ liquids (ie petrol). Diesel meanwhile is not considered a dangerous good. Whether this translates into an exception or not may differ by state or, perhaps more practically, by enforcement/responsible person in question. eg. One may find a service station will not permit one to fill them with diesel, as it would be illegal to fill them with petrol, and it’s easier to require approved containers for both petrol and diesel than differentiate.
I invite corrections on that from more experienced outback travellers. I admittedly was more thinking Alaska/Atacama etc and those parts of the world where it’s Rafferty’s Rules.
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