ISA competition
The ISA competition was a Stunts championsip organised by the members of the International Stunts Association (hence, the acronym), a group of Austrian racers led by Pershing II, Ruepel and Agent Orange. While it was active as such for only one season that lasted a few months from February to September 2002, it is considered one of the cornerstones in the formation of modern Stunts tournaments, having pioneered the definition of free OWOOT rules, also referred to ask ISA rules.
The tournament did not really end at that time, but transformed. Mingva took over to ensure the competition's continuation and the rules changed. Thus, it evolved into the Indy Racing Cup. The same website was used to run it. It's notable how two championships that share the same history define today the two extremes of the OWOOT spectrum.