Long Option Delivery Margin for Physically Settled stocks

Is this delivery margin applicable on all contracts?

Yes, the expiring month i.e. near month contracts which are physically settled will be applied delivery margins only in case they are in-the-money (ITM) long option positions. Please note there could be adhoc expiry notified by exchange in a particular underlying and in such cases the delivery margin is required to be applied across all contracts ITM Long Options positions since they will expire in the near month irrespective of their original expiry dates.