What is a SIT IN judge?
I assume, like the one that didn't make the flight today from Cozumel.
A "fill-in."
Greta said PVDS called himself a Sitting Judge (I take it as a SIT IN judge) - Like a judge in training on the island, but has his finals in Holland. He failed his finals in Holland to become a full time judge.
Like a nursing student who works in a hospital and then becomes a nurse if they pass their nuring finals after the end of their training and studies. On the job training plus studies.