So currently there is no reservation for OBC category in NLU for selection process. The 23 NLU's have already got notice by NCBC regarding the reservation for OBC category. Currently due to lockdown no certain decision has been taken. But last hearing was done on January 20. So their is no such specific marks requirement for OBC.
To know about the cut-off/marks required in clat exam for OBC category for NLU and other top colleges, you can visit the following link:-
Hope this information would be helpful for you
All the best for your bright future.