Episcopal conferences are generally defined by geographic borders, with all the bishops in a given country belonging to the same conference — which might also include neighboring countries. Certain tasks and authority are assigned to episcopal conferences, particularly with regard to setting the liturgicalnorms for the Mass. Episcopal conferences receive their authority under universal law or particular mandates. In certain circumstances, as defined by canon law, the decisions of an episcopal conference are subject to ratification from the Holy See. Individual bishops do not relinquish their authority to the conference, and remain responsible for the governance of their respective diocese.