CAO 82 simply does not apply here, with regard to remote islands
Marauder, I'll take your word for it at the moment, but beg to differ. Please explain why CAO 82.0.2.3 does not apply, as far as I can see it applies to aerial work, charter and RPT. This part defines what is regarded as "minimum safe fuel", where as 3A.1 elaborates a little further by directing that charter must have more than one engine and the alternate may not itself be a remote island. It directs that the flight may "not carry less than the minimum safe fuel".
As said before, the "minimum safe fuel" is determined by 82.0.2.3. Stand to be corrected.
Edit and I'm dragging the chain in response.