Ariz. Admin. Code § 12-8-301
In this Article, unless the context otherwise requires:
1. "State Historic Preservation Officer" or "Officer" means an employee of the Board who has professional competence and expertise in the field of historic preservation and administers the State Historic Preservation Program.
2. "Arizona Register of Historic Places," "Arizona Register," or "Register" means the state's list of Arizona's historic properties worthy of preservation that serves as an official record of Arizona's historic districts, sites, buildings, structures, and objects of national, state, or local significance in the fields of history, architecture, archaeology, engineering, or culture. Properties listed on or eligible for the Arizona Register of Historic Places may also be eligible for listing on the National Register of Historic Places.
3. "National Register of Historic Places" means the official national list of historic districts, sites, buildings, structures, and objects significant in American history, architecture, archaeology, engineering, or culture.
4. "Historic Sites Review Committee" or "HSRC" means a standing committee of the Arizona Historical Advisory Commission, which is appointed by the State Historic Preservation Officer under A.R.S. § 41-1352 to review nominations of properties for listing on the National or Arizona Register of Historic Places.
5. "Historic property" means a building, site, district, object, or structure evaluated by the HSRC as historically significant.
6. "State Historic Preservation Office" or "SHPO" means the program staff that work under the supervision of the Officer.
Ariz. Admin. Code § R12-8-301