Need help..

Hi frnds,

I need a help from u all experts. I am a CA final student and my attempt is due in Nov.,2013 and my training would be completed in Feb,2014. Now, I want to pursue CS alongwith the CA. But my question from you all is that is it mandatory to undergo 15 months training which is required  by ICSI, if i am alredy doing my 3 years CA articleship...????

Thanx in advance...:)