In December 2012, The US District Court in Los angeles decided that Bikram Choudhury's yoga college sequence of 26 poses in a heated room could not be protected under copyright. Though Choudhury had registered the copyright describing the sequence in writing and visual materials, the judge found the copyright protected the expression of the sequence but not the sequence itself. The court found the yoga poses were not copyrightable as the sequence was merely a "process, system, concept" outside the protection of copyright. Choudhury had been very aggressive in filing lawsuits against those who used the sequence and style without permission and previous cases had been settled. This ruling will provide a benchmark for future yogis and performers to consider when they decide to copyright a performance/process.