Foreign Minister Julie Bishop has refused to explain why documents about Australian spy operations during the Indonesian occupation of East Timor should remain secret.
Since 2014, Canberra academic Clinton Fernandes has been trying to get access to the Australian Secret Intelligence Service's 43-year old records about East Timor through the National Archives of Australia.
The overseas secret intelligence director general Paul Symon was due to argue against release at an Administrative Appeals Tribunal private hearing on Friday.
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