Dear student,

CSAB - CENTRAL SEAT ALLOCATION BOARD, is responsible for filling the vacant seats in nits or iiits or gftis.
Csab is held every year, because every year there os some vacant seats left in nits or iiits or gftis.
Now, this year there is also a chance, that if the seat remains vacant, then yes, csab will be held. Csab counseling will start after josaa all rounds counselling.
There will be two rounds of csab, and the registration is not started yet.
The official dates are yet to come.

Check out the following link to know more about csab counseling :-
https://engineering.careers360.com/articles/csab/amp