If you had a prearranged fuel dump, the operator should have a refueller on the ground.
The operator doesn't have unlimited people, maybe 3 pilots and that's it. And they might all be working the fires in different places. Subsection 7 applied at the fuel drum dump.
The fuel was put there by the local BP supplier, who would travel between dumps, replacing empty drums. He didn't have people to be left at each site in case a chopper dropped in. He left a pump and testing kit at each dump. Nice guy, he did it off his own bat, this was in the 9os before the whole show was a lot better organised. Shane Fitzsimmons was just another nice guy in the fire service, he didn't know he would be Commissioner down the track.