Burning Man participants who wish to bring motorized mutant vehicles must submit their designs in advance to the event's own DMV or "Department of Mutant Vehicles" for consideration. If a vehicle design meets the "Mutant Vehicle Criteria, the vehicle is invited to the event for a final physical inspection and licensing at the event. Not all designs and proposals are accepted. The event organizers, and in turn the DMV, have set the bar high for what it deems an acceptable MV each year, in effect capping the number of Mutant Vehicles. This is in response to constraints imposed by the U.S. Bureau of Land Management, which grants permits to hold the event on federal property, and to participants who want to maintain a pedestrian-friendly environment. Vehicles that are minimally altered, and/or whose primary function is to transport participants, are discouraged and not invited. One of the criteria the DMV employs to determine whether an application for a proposed Mutant Vehicle is approved is "can you recognize the base vehicle". For example, if a 1967 VW van covered with glitter, dolls' heads, and old cooking utensils can still be recognized as a VW van, the DMV would consider it an "Art Car", but it would not be sufficiently altered to meet the Mutant Vehicle Criteria.