“However, if a safe landing location is not an option and you are landing with less than your fixed fuel reserve, then you must declare Mayday Fuel.”
If the above quote from the CASA website from post#1 is taken literally, as long as you have a safe landing location even with than less fixed reserve fuel, you are not required to declare Mayday Fuel.
As to to the possibility of having to land in a paddock, running low on fuel has always been given as one possible reason for a precautionary landing off airport, so no change really.