Here is the official rules:
http://www.bootcamp.navy.mil/fam_guide.asp
Note: You cannot edit the names. However, I've only seen about 3 times in 4 years where not everyone was allowed in. Those times
the PIR groups were like 14 divisions. So I wouldn't worry at all.
The people on the list just need to get in early and reserve seats for those that have to wait.