They may not be "officially" pl protected. One explanation could be that, a long long time ago, in a galaxy far far away, one of the people responsible for programming thier equip, started to program tx pl, in preparation for them to go fully. The decision to go to full pl may not have ever been made, but throughout the years, equip started to get programmed with both tx and rx pl. That has happened to alot of our customers over the years. This is just my opinion on what has happened.