"only the authorities are qualified."
AHEM. Don't forget Blackwater, they get to carry their rifles as well.
Maybe they have been deputized. Blanco issued an emergency order waiving requirements for a bond in order to perform law enforcement for the state.
Aand even if they haven't, stand by for dearth of evidence (ala Miller's "there is no evidence that a short barreled shotgun has any militia use"), or other excuse to find that this action comports with the Constitution.
It can't be any other way, because that would give control back to the people.