E/e Mark is also the European Common Market. For motorcycles, their safety and spare parts products, noise and exhaust gas, etc., they must comply with EU regulations [EEC Directives] and the ECE Regulation. Certification requirements, that is to grant a certificate of compliance, to ensure the safety of driving and environmental protection requirements. E-Mark has different numbers depending on the country of certification. For example, when Luxembourg applies, the E-Mark mark is E13/e13.