(2)Critical benchmarks are often used in Member States other than the Member State where they are provided and are used in different ways, depending on the Member State in which they are used. Therefore there is potential for significant impact in either one or more Member States or at Union level. Similarly, there is potential for significant adverse impact with regard to only one or more of the criteria referred to in Article 20(1)(c)(iii) It is therefore important to conduct the assessment both at national or market level as well as at Union level.