11.1 Energy efficiency testing and retesting should be performed by test agencies or vehicle manufacturers (hereinafter referred to as Accredited Agencies) authorized by the Competent Authority.11.2 The energy efficiency testing for passenger cars, commercial vehicles, and light-duty trucks shall be tested in accordance with either the Federal Test Procedure (FTP-75) of the United States or Directive 1999/100/EC of the European Union and subsequent amendments (may adopt either NEDC or WLTC driving cycle for the test); the energy efficiency testing for motorcycles shall be tested in accordance with Motorcycle Fuel Economy Test Method (as attachment).11.3 The energy efficiency labeling for electric passenger cars, light-duty trucks and commercial vehicles shall be in accordance with EU directive ECE R101 and its subsequent amendments (may adopt either NEDC or WLTC driving cycle for the test); the energy efficiency labeling testing method for electric motorcycles shall be in accordance with National Standards CNS15819-4 and its subsequent amendments, but the driving cycles and vehicle simulated inertia weight shall be in accordance with “the Fuel Economy Test Method for Motorcycles” (attachment).Attachment The Fuel Economy Test Method for Motorcycles.pdf