person identity number for child

I've been searching for the "person identity number" for my child to apply for natrulisation. Can you please help me out, how do i get this number? Is it same a my wife's Person identity number that is on her GNIB card?

thanks in advance.

noone has any ideas on the above?

Kids have no GNIB registration and they only get the re-entry visa. I don't think kids have person ID number. You can visit GNIB for more accurate answer.

Thanks Calvin, I dont understand why they put the question there on form 9 if kids dont have GNIB numbers.
I have left it as N/A . Well see how it goes!