Postal papers are compulsory in case of icsi ??

Dear Friends

I have enrolled for CS today, and i am eligible for one group exam to be held in June next year. Now while siubmitting the forms to Chapter of ICSI.. i ask member about postal papers. He said there is nothing like postal thing in case of CS. But i enquired today from old student, he said i have to submit papers to ICSI. 

I am totally confused now. Can u please guide me what i need to do now and what is the end date to submit all the exam papers... and how much i need to submit exams... as i can only write one group please guide what group i should i opt.

And i need to submit postal papers for one group or both groups ??