yowie,
The point you raise is the crux: you
can carry a limited number of approved 20lt jerrycans on non pax flights, as Dangerous Goods, as long as they comply with the limits set in the IATA DG Manual, and as long as the carriage is iaw the Company Ops Manual/DG Manual if it is an AOC operation.
The actual number will have to be looked up by someone with access to the IATA DG Manual, I'm on holiday
