I've noticed throughout 3.5 and PF, that some of these Prestige classes have Special situations in order for your to pick them up as classes even after you make the necessary requirements. Does that mean players would have to make some sort of special request to the staff about a solo event to satisfy such requirements (I.e, Hellknight Commander/Enforcer must kill a devil of a higher HD in front of an official Hellknight), or are we perhaps SOL due to the setting?
Prestige Class Requirement Inquiry