The European Parliament approved new rules reducing emission limits for motorcycles and mopeds on November 20, 2012. The rules are part of a broader standard for safety of various components and systems in motorcycles and mopeds— European Parliament, Regulation of the European Parliament and of the Council on the Approval and Market Surveillance of Two- or Three-Wheel Vehicles and Quadricycles. Under the new rules, these vehicles must meet the Euro4 standard by 2016, which will result in emissions of about 42 percent less carbon monoxide, 32 percent less hydrocarbons and 46 percent less nitrogen oxides than under the currently applicable Euro 3 standard. By 2020, motorcycles and mopeds must meet the even stricter Euro 5 standard requirements.