Long Option Delivery Margin for Physically Settled stocks

From when and how will the delivery margins be levied for physically settled long option positions?

Margins will be levied from Expiry-N trading day and currently N is 4 trading days which will be defined as per the discretion of I-Sec. The Delivery margins will be collected on daily basis in a staggered manner starting from Expiry-5 trading EOD onwards till expiry. Please refer the below given example on how Delivery Margins are applied: Example of Delivery Margin: Say a customer has ITM Long Call Option position in Apollo Tyres (APOTYR) August contract with; Quantity = 1700, Strike Price = Rs.420 and Spot remains above Rs.435 till expiry. In this example, total delivery margin required on expiry day will be Rs. 142800/- and the same will be collected by I-Sec in part starting from E-4 trading day onwards i.e. Delivery Margin required on first day EOD on 25-Aug-23 will be Rs.14200/-, on 26-Aug-23 Rs.35700/- and so on till expiry day of 31-Aug-23