Articleship registration-orientation programme

I have completed  my both groups of IPCC alongwith ITT. However, i have not completed my orientation programme. Now i am about to join articleship. Can anyone clarify me as to whether the Orientation Certificate is compulsory for registration of articleship or is it ok if i join the orientation programme after registration of articleship.

anticipating early response from experts.

Regards,

Dhanasekhar.