Dear Mahima

Yes, there will be new registration process for the 2nd round in case of any vacancy of seats in Haryana medical colleges. But, students who have already registered for 1st round and gone through document verification, do not need to register and verification again.

You may go to mentioned link for other rules as well http://dmerharyana.org/wp-content/uploads/2019/06/Notification.pdf

Hope this helps you.