The comment period ending September 22 for Japan's proposed 2020, 47.7 miles per gallon fuel economy target for passenger cars has seen many comments from international automakers arguing the standards are discriminatory and asking that the country either adopt a set of exemptions for imports or support the establishment of the Worldwide Harmonized Light-duty Test Procedures (WLTP). The WLTP standards are currently being discussed in the UN Economic Commission for Europe's WP29 forum on motor vehicle safety and environmental standards and certification.