Hello Shivani, 

For BA LLB course at Punjab University Chandigarh, all the important dates and details are provided in an article whose link has been attached below.

https://www.google.com/amp/s/law.careers360.com/articles/pu-ba-llb-important-dates/amp

For the further details of subsequent rounds and further allocation process, you need to visit the official website of PU on regular basis so that you get all exact, accurate and timely data.

Hope it helped..