You’re projecting there.
He applied for the medical exemption (which other tennis players had the right to do as well).
They reviewed the medical exemption based on what was provided to them. You could get an exemption if you were infected in the last few months (because such an event restricts the capability of getting vaxxed). Vic Gov and Tennis Australia thought it was that way. Feds didn’t. Maybe they let them know well enough, maybe it changed a long the way and got confusing.
Based on what was provided, he met the requirements of the medical exemption.
The validity of the evidence needed to verified at the border on entry.
That’s pretty much consistent with any international travel. You do get 'pre approval for a visa, but you can be held at the border if it is suspect.
Unfortunately…
The court case didn’t argue all the issues around the test result. It was left within the bounds of process at the border. Maybe the process for the ‘pre approval’ needed to be run past the Fed Gov medical officer rather than ‘leaving it up to the states’.
If Vic Gov wanted him in, they would have just sponsored him through. And it wouldn’t have been an issue. But Vic Gov said they weren’t sponsoring everyone. Entry at the border is a Federal Issue. Medical exemption is a medical issue. Politics shouldn’t come into it.