As from 1 July 2009, new vehicles with lower emissions of carbon dioxide (green vehicles according to the old green vehicle definition) are exempt from annual vehicle tax for the first five years. On 1 January 2013, more stringent criteria for the five-year exemption, involving weight-based carbon dioxide emission requirements, were introduced. The tax exemption was also extended to include motorhomes, light goods vehicles and light buses. This means that passenger cars, motorhomes, light goods vehicles and light buses brought into use in Sweden for the first time on or after 1 January 2013 are exempt from annual vehicle tax for the first five years, provided that their carbon dioxide emissions (according to data in the Road Traffic Registry) do not exceed a maximum level calculated in relation to the vehicle weight (green vehicles according to the new definition). At the beginning of 2012, a super-green vehicle rebate of up to SEK 40,000 was introduced for new vehicles emitting a maximum of 50 g CO2/km (super-green vehicles).