The only restraint on SE (inc Hawks) arriving at NHT is that they can comply with relevant VFR and Rule 5. It is not OC Ops who accepts the risk; it is the pilot's responsibility to observe the rules! The original entry into the BINA was requested by a (very) previous OC Ops/Stn Cdr going the "extra mile" for safety's sake, not because he had to make the entry, and it's been there ever since!