New rules adopted by the US Congress and Barack Obama has forbidden the use of testimony obtained through cruel treatment or torture. It comes as 9/11 suspects Khalid Sheikh Mohammed and his co-defendants appear for a hearing at Guantanamo Bay, Cuba.
General Mark Martins, the chief prosecutor, said the commission provides many of the same protections that defendants would get in civilian court. "I'm confident that this court can achieve justice and fairness," he said.
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The body of 25-year-old Akbar was found intact and full-clothed after searchers hunted down the python and sliced it open on Wednesday.
The ruling means Mr Trump cannot enforce his ban, which blocks new visas for people from six predominantly Muslim countries.
Thursday could be the warmest day of 2017 so far, with temperatures of 22C (72F) forecast, double the average for March.