EBU Single Rulebook Q&A 29 June 2015 2015_2075 Entity that formally is not a part of public administration as resolution authority

Is it possible under Directive 2014/59/EU (BRRD), in particular under Article 3 to designate as a resolution authority, an entity that is entitled to issue administrative decisions but formally is not a part of public administration? Are bodies that can be designated as resolution authorities be restricted only to bodies that are public administrations?