The document summarizes the history and current regulations of Arizona's onsite sewage system inspection program. It began in 2002 with a voluntary transfer of ownership inspection program and became mandatory in 2006. Inspectors must now be certified after completing an approved training course. The process requires qualified inspectors to inspect systems, fill out a report of inspection form, and submit it along with a notice of transfer form within 15 days of a property sale. Over time, the training program in Arizona has expanded to educate more stakeholders on proper inspection and maintenance of onsite sewage systems.