By what time One should join articleship after IPCC

I have a brother who has appeared for CPT inthe last exam. He would be taking admission in day college(there is no scope for morning one), so would not be able to do his articleship with the college. He would like to appear in IPCC in November 2011. Does he require to start his articleship right after passing IPCC exam or can he delay it till the time he clears his grads. Also kindly state if he requires to start his articleship right after his IPCC, by what time he is required to start it and whether he can delay his IPCC till the TYBCOM year.