I wasn't aware that DPhiE policy says to extend a bid to every legacy. I don't think I've ever heard other DPhiEs here say that a legacies are guaranteed a bid.

Being a legacy DOES NOT guarantee the PNM a bid. While they are extended certain courtesies, it's not an automatic "in".

On some campuses, the number of legacies going through rush might even exceed the number of spots available in a chapter. There's no way for the chapter to take all the legacies that come through the door.