HPDT operates independently from the Board and other registration authorities. The HPDT typically hears only the most serious of complaints. For any given hearing the HPDT is composed of the Chairperson (Barrister or Solicitor of the High Court), or a deputy chairperson, and four others (three of whom must be professional peers of the health practitioner and one who must be a lay person). The source of the charges before the HPDT is either the Director of Proceedings (Health and Disability Commissioner's office) or a Professional Conduct Committee. HPDT decisions and events are published on the HPDT website: www.hpdt.org.nz