Art car recent years the festival has been forced to limit the number of vehicles on the playa. As such they have restricted the vehicles that are licensed to what they are now calling "mutant vehicles". There has been some confusion within the Burning Man and Art Car communities over these two terms, with some believing the terms are simply synonyms. According to art car artist and Art Car Fest organizer Philo Northrup, art cars are "street-legal vehicles that have been permanently transformed into mobile sculptures". According to the Burning Man DMV ("Department of Mutant Vehicles"), Mutant Vehicles are "'art on wheels':
Technical, Administrative and Supervisory Section roles, changing its name to the Draughtsmen's and Allied Technicians' Association (DATA). In 1970, DATA amalgamated with the Amalgamated Union of Engineering and Foundry Workers (AUEFW) and Constructional Engineering Union (CEU) to form the Amalgamated Union of Engineering Workers (AUEW). The former members of DATA formed the Technical and Supervisory Section of the new union. At the 1973 Representative Council Conference it was agreed to rename it the Technical, Administrative and Supervisory Section (TASS). In 1985, after considerable problems within the AUEW, TASS broke away to become an independent union. TASS absorbed the National Union of Gold, Silver and Allied