In my personal oppinion, there should, in the intrest of RPing Zone 21 right, be a Liberty Dreadnought Permanently stationed on either side of that gate, each with guard tags, and they should destroy, without warnings or any sort of communication, anything that comes through that gate, or approaches through the minefield, or through alaska, who do not, Before entering range of the Dread, announce their presence, their intentions, and their authorization. This is because Zone 21 is restricted space. I would also suggest the beacons in Alaska be replaced with weapons platforms.
That said, the jumphole should stay, because its how the Navy gets its highly classified fleets of defenders into the omicrons, as Dab pointed out.
The order high command probably deserves to know about it, because that is probably how they fled liberty space.