How to revalidate ipcc registration?

castdnt (ipcc) (292 Points)

25 February 2015  
I registered ipcc on 1st august 2012 .I m giving ipc nov 2015 grp 1 and may 2015 grp 2. my ipcc registration is going to expire on 31st july 2016 so when should I revalidate my ipcc registration before giving grp 2 or after giving grp 2?? plz suggest.