MIA and Vamil are subsidies available to entrepreneurs willing to invest in environmentally-friendly equipment. MIA is short for environmental investment deduction, a tax relief scheme for entrepreneurs willing to invest in environmentally-friendly equipment. The Vamil scheme deals with accelerated depreciation of environmentally-friendly equipment. Since 1 October 2006, installation of motors meeting the euro-4 emission standard in buses and commercial vehicles for the transport of goods not exceeding 3,500 kg is imperative and is no longer promoted through MIA/Vamil subsidies. Vehicles as mentioned above are only liable to the MIA/Vamil subsidy, if they have indicated their preparedness to invest prior to 1 October. The registration certificate must be issued before 31 December 2006.