CV and mad panic behaviour

[Mav]

Which government authority gave him an exemption?  THAT'S the question

No it isn't. AFAIK, the framework is that the Victorian Govt is responsible for determining whether people, including travellers, have permission to work in the State. The Federal Govt has the constitutional power and responsibility of regulating entry into Australia. The Federal Government has the power to refuse entry to someone who has a work permit in Victoria.

It appears there is a difference between the Victorian Govt's grounds for a medical exemption and those the Federal Govt recognises. The Victorian Govt accepts infection with Covid in the preceding 6 months as a ground for granting a medical exemption while the Federal Govt does not. Both Govts are entitled to their own standards.

The real question is why the Federal Govt didn't make this clear before Djokovic flew to Australia. It's not as though it his arrival is a surprise. The debate over whether Djokovic should be allowed to play has been going on for months. Surely, someone in the Ministry of Immigration could have been asked to look into the issue in the months before it culminated in his arrival. Maybe they're all flat out trying to keep asylum seekers in Nauru. 

PS: This is all a bit speculative as none of us knows exactly why Djokovic was given an exemption and why the Border Force decided his paperwork was out of order. I hope any Federal Court action will reveal exactly what went on and there are no restrictions preventing the press from reporting on it.