This system was abolished in 1966, during the dictatorial rule of Juan Carlos Onganía, and replaced by a Concordat which gave the Vatican the attribution of appointing and removing bishops, leaving the President only with the right to object the appointments. In the 1994 constitutional reform the Concordat was awarded the rank of international treaty and thus given priority over national laws, although Congress is still allowed to reformulate it. The same reform eliminated the constitutional requirement for the President to be a Roman Catholic.