and have an additional 4 mph (6.4 km/h) limiter for footway use. to be road safe in both uk and eu due to difference in maximum legal speed (8 mph/13 km/h for uk and 26 km/h/16 mph for eu), some electric mobility scooters come with speed limiter switch. however, while users of eu countries can register the vehicle which can travel 26 km/h (16 mph) in their own country, users of uk mobility scooters will not be able to do so, if the vehicle in any way can reach more than 8 mph (13 km/h) speed, as stated by dvla requirements regarding mobility scooters. as of march 2010 a government consultation is underway to determine how the law should adapt to increasing scooter use, whether higher road speeds should be allowed and on a replacement for the archaic term "invalid carriage". due to concerns over safety issues and problems with bringing prosecutions against irresponsible users under existing laws, the consultation will also consider whether to make third party insurance mandatory, consider the introduction of compulsory training for users and discuss how to bring scooter users under wider road traffic legislation. because electric mobility scooters fall under the category of medical aid, when making a purchase of such vehicle, people with disability or long-term illness might be eligible for vat relief. in addition hmrc states that any spare parts and servicing for goods purchased on vat relief should also be sold without vat. however parts which could be used for taxable purposes (such as batteries) are not vat-free. a class 2 invalid carriage does not require registration. class 3 invalid carriages may not be driven by a person under 14 years; they need to be registered with the dvla and are subject to vehicle excise duty ("car tax"), though the rate is zero. disability essex told the committee about four deaths resulting from mobility scooter accidents in one year in essex alone, but there is little evidence to suggest that fatalities on this scale are replicated nationwide. in canada, mobility scooter users are classified as pedestrians and thus may legally use sidewalks for travel. this classification is based on wheel diameter. however, a mobility scooter weighs approximately 70 to 80 kg (150 to 180 pounds) without the driver and can cause serious injury or death. users must take care while driving around pedestrians on sidewalks. there is growing concern, and even hostility, about the use of mobility scooters in crowded urban areas. tied to a growing hostility towards disabled people more generally. an australian senate enquiry into mobility scooters was announced in 2017, after politician john williams' wife nancy was injured by one.