The Australian National Flag, was chosen in a government approved public competition in 1901 and is registered under law as the chief national symbol of Australia.
The Commonwealth Parliament approved and passed into law the FLAGS ACT 1953.
With the passing of the Flags (Protection of Australian Flags) Amendment Bill 2008 (C2008B00208) the current design of the Australian National Flag can only be changed by democratic vote of the Australian people.
Separation of Scotland from the United Kingdom would have no effect whatsoever on the current “Stars and Crosses” design of the Australian National Flag.
The Australian national flag is the sovereign property of the Australian people who give permission to their (Commonwealth) government to use their flag.
No other country or people own or have influence over the use or design of the Australian National Flag.