Years ago, a friend high up in ATC told me that any incidents involving foreign reg a/c went through Foreign Affairs.
This was in response to a query as to the outcome of a foreign a/c commenced t/o after the clearance had been cancelled.
His reply was that the 225 would have been torn up and binned by or on instructions of Foreign Affairs.
It would therefore be reasonable to assume that Foreign Affairs would have a large say in the final version of the ATSB report.
Emeritus