19 February 2013
Yes, you can revalidate your registration on or before 31-12-2013 with out paying any fee. from 1-1-2014 you have to pay fee of Rs.500 per each revalidation. However your registration is valid upto 31-12-2013. So for May'13 and Nov'13 exams you need not to revalidate now. For more details please verify the notification on 7th Feb 2013 by ICAI at www.icai.org other please send your mail id i will send you such notification.
Thank you very much for your advice. I was going to send the letter to icai. Could you please send the said notification to my id @ nature_creature@yahoo.co.in or you can also post the link of said notification.