Articlsship duration query

Hello CCI Members,

I've Regeistered With Institute For

CA-CPT with effect from 14 Aug 2009

CA-IPCC with effect from 29 Jan 2010 and

Cleared IPCC in May 2011

For How Much Period I am required to do Articles 3 or 3.5 years?

                                                                                                            Thankyou