Article 2
1. Other techniques than those listed in the Annex to this Decision may be used. In such cases, Member States shall validate, based on scientifically established methods, that the use of such techniques, as defined in Article 3, point (10)(a), of Directive 2010/75/EU ensures at least an equivalent level of environmental protection to those listed in the Annex, including human health and climate protection, also taking into account animal welfare systems recognised at Union, national or international level. 2. Environmental performances of techniques listed in the Annex to this Decision that are different from those listed in Sections 4 and 5 of that Annex may be used. In such cases, Member States shall validate such environmental performances, based on scientifically established methods. 3. When techniques listed in the Annex to this Decision are used for which the environmental performance is not specified in Sections 4 and 5 of that Annex, Member States shall validate their environmental performance. 4. When combinations of techniques are used, Member States shall validate the environmental performance of such combinations of techniques. 5. Member States shall ensure that all underlying data required by Directive 2003/4/EC of the European Parliament and of the Council ( 8 ) , methodologies, and assumptions used for the validations carried out in accordance with paragraphs 1 to 4 of this Article, are fully documented and publicly available.