(25)The existence of a special public supervision framework is an element defining covered bonds according to Article 52(4) of Directive 2009/65/EC. However, that Directive does not specify the nature and content of such supervision or the authorities that should be responsible for performing such supervision. It is therefore essential that the constitutive elements of such covered bond public supervision are harmonised and that the tasks and responsibilities of the national competent authorities performing it are clearly set out.