Hyy saishyam, 

After the fourth or the last round of counselling, the NLUs with vacant seats will release a notification stating the number of vacant seats in their respective courses.

The notification will also state the procedure to be followed, which is basically filling up an online form, or an offline form of which you'll have to send a scanned copy.

Thereafter, within a week or so the list of selected candidates is published.

You'll get every information related to vacancies, starting from the number of vacant seats available to the list of candidates selected and the procedure to be followed post selection on the university's website.

Vacancy procedure is NOT conducted by the CLAT organising university of the particular year, this means you'll get no notification whatsoever from NUALS Kochi website for 2018. NUALS Kochi will publish the vacancy list for the vacant seats of it's own BA.LLB or BBA.LLB course and not other NLUs.

Hence, do not depend on the CLAT website to guide on you vacancy procedure.

You'll have to keep an eye on each university's website for any such information.

All the best!