In the First Place, you should be allowed to buy on 3rd to square up.
If you don't square on 3rd for whatever reason, then it will go to Auction on 5th.
It will be bought in Auction Market at the prevailing Price. If Essaroil is not available in Auction Market ( which is highly unlikely ), then it will go to Settlement.
In settlement, you are likely to be levied a penalty of 10 or 20 % ( not sure ) on the Last Transacted Price.
I do belive that it will not go that level.
Hope you will find this info, useful.
Cheers & Good Luck
PAKatil