CS 15 months training

Hi all, I am here to ask for your help. I have cleared 2nd group of c.a. final & have completed my articleship too. I have taken permission of ICAI to pursue CS. I am appearing in 1st group of c.a.final in may 2011. I have cleared 2nd & 3rd module of CS Professional programme. Now I want to register myself for 15 months CS training. Could anyone tell me whether I need to take ICAI's permission again for CS articleship.

Please help. I shall always be grateful.

Thanks.