Hi Alok, 

No there is no counseling fee.  You will be allotted seat on the basis of your rank and you will have to keep a regular check on the applicant profile section. So far as vacant seats are concerned every NLU publish list of vacant seats and certain documents have to be posted and uploaded at the time of applying for vacant seats. Once the notifications for vacant seats will start coming in the website all the necessary details will also be mentioned therein. Keep visiting clat.ac.in