The disabled drivers' and disabled passengers' (tax concessions) scheme enables qualifying persons to purchase a new car every two years free of vehicle registration tax, VRT, and VAT to a maximum of £7,500 if the qualifying person is the driver, and £12,500 if the passenger. In addition, the scheme provides for the refund of excise on up to 600 gallons of fuel and for an exemption from annual road tax. It is estimated that the scheme cost some £22 million in 2000, excluding the annual road tax costs. The mobility allowance, which is a monthly payment administered by the health boards, provides financial support to severely disabled people who are unable to walk or use public transport and is intended to enable them to benefit from a change in surroundings – for example, by financing the occasional taxi journey.