Hello,
Pu has one chandigarh main campus and other regional centres. The councelling for different centres is scheduled on different dates . As per the 2019 councelling schedule the councelling for chandigarh campus is scheduled on 24 th july for regional  ludhiana centre it's scheduled on 26 th july.
You can get detailed information about the same by browsing through the official site. The councelling merit list is made as such that students with lesser ranks will be called for the chandigarh campus first. Those who make it ,it's good rest others are called for the regional centres.
The councelling dates are already out . You can access the same through the official site.
Hope this helps
Good luck

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