ISO 7176-16:2012 specifies requirements and test methods to assess the resistance to ignition by match flame equivalent of all postural support devices that are supplied to be part of a wheelchair or its seating system. ISO 7176-16:2012 only determines the resistance to ignition of the devices tested and not the ignitability of the complete wheelchair. ISO 7176-16:2012 allows for the separate testing of inferior/superior supports (e.g. arm supports), which are usually used in the horizontal plane, and anterior/posterior/lateral/medial supports (e.g. thoracic harnesses, calf panels), which are usually used in the vertical plane.