Split and simplify the following sentence while retaining its full meaning: Whereas , for apparatus covered by Directive 86/361/EEC , in order to obtain efficient protection as regards electromagnetic compatibility , compliance with the provisions of this Directive should nevertheless be certified by marks or certificates of conformity issued by bodies notified by the Member States; whereas , to facilitate the mutual recognition of marks and certificates issued by these bodies , the criteria to be taken into consideration for appointing them should be harmonized.
 Simplified version:
For the devices covered by Directive 86/361 / EEC , however , in order to achieve effective protection in the field of electromagnetic compatibility , compliance with the provisions of this directive must be confirmed by test marks or certificates of conformity issued by test bodies notified by the member states . In order to facilitate mutual recognition of the test marks and certificates of conformity issued by these bodies , harmonization of the criteria to be taken into account is advisable for their identification .