TDI engines from 2009 and on are designed to use ULSD exclusively; biodiesel blends are reported to prevent that failure. Some filling stations in Kenya started offering 50 ppm diesel as of December 2010. As of 2018, Kenya has not fully implemented emission control systems. As of June 2012, 50 ppm diesel is now standard across all filling stations, in a bid to reduce pollution. Morocco has started to introduce 50 ppm diesel to filling stations as of 2009. Since 2011, the 10 ppm diesel has been available in some filling stations. A generalization to all filling stations with the 10 ppm diesel is available since December 2015.  50 ppm sulfur content was first legislated by the South African Department of Minerals and Energy in early 2006, and has been widely available since then. South Africa's Clean Fuels 2 standard, expected to begin in 2017, will reduce the allowable sulfur content to 10 ppm. Sasol has already launched 10 ppm diesel at selected filling stations as of 2013. China has limited sulfur in diesel fuel to 150 ppm (which is equivalent to the Euro III standard). The limits of 10 ppm (Which is equivalent to the Euro V standard), only applied for certain cities such as Beijing. From 2014 to 2017, China will limit sulfur in diesel fuel to 50ppm. After 2017, the sulfur content in diesel fuel will be limited to 10ppm. In July 2000, Hong Kong became the first city in Asia to introduce ULSD, with sulfur content of 50 parts per million (ppm). In addition, new petrol private cars were asked to meet Euro III standards from 2001. Since the introduction of the law, all fuel station started supplying ULSD since August 2000. Sulfur content of regular diesel fuel was lowered from 500 ppm to 350 ppm on 1 January 2001. As part of the ULSD package, Hong Kong government lowered the tax for ULSD from HK$2.89 to $2.00 per litre in June 1998. The temporary concession was extended to 31 March 2000, then to 31 December 2000. On 19 June 2000, under "Report of the Subcommittee on resolution under section 4(2) of the Dutiable Commodities Ordinance (Cap. 109)", ULSD fuel tax was lowered to HK$1.11 per litre between 7 July 2000 and 31 December 2000, then increased to $2 in 2001, then $2.89 per litre on 1 January 2002. This resolution was passed on 27 June 2000. Under "LC Paper No. LS 37/00-01", which passed on 20 December 2000, the $1.11 per litre tax rate was extended to 30 June 2001.