Not only that, but the NO has changed its ordination Rite (in 1968) to one that is virtually identical to the Anglican rite which was declared null and void by Pope Leo III in 1896 for defect of form.  Contrary to popular opinion, the Pope does not possess the authority to change the sacraments.  If the Anglican rite was defect, so is its twin in the NO.  Whether or not a Rite is valid is not BECAUSE a pope said so, it is for the circumstances for which it is declared so.  An invalid form is invalid no matter what century we live in.  So the question begs asking, are any of the "presbyters" installed using the new "Rite" validly ordained?  And if not, they can't confect the sacraments.  Nor could they be considered priests, bishops, or even popes.  
How does one know for certain?  One problem with the post V2 changes is all the doubt they've introduced.  But on the other hand, "by their fruits ye shall know them."