Ariz. Rev. Stat. § 21-422 – Powers and duties

A. The law applicable to county grand juries, including their powers, duties and functions, applies to the state grand juries except insofar as it is in conflict with this article. The supreme court shall adopt rules to govern the procedures of state grand juries.
B. The state grand jury shall investigate and return indictments for only those offenses or violations of law arising out of or in connection with:
1. 1. The determination or collection of state taxes, the registration or failure to register securities, the offer or sale of securities, the offer or sale of interests in land, the formation or operation of banks, insurance companies, pension funds, labor unions, professional sports enterprises, corporate enterprises or business enterprises, the making or collecting of loans, events leading to receivership or declaration of bankruptcy by a business enterprise, the sale or purchase of goods or services by or for the state or political subdivisions, bribery, obstruction of justice, hindering prosecution or any form of intentional, knowing or corrupt misconduct involving any person compensated by public funds.
2. 2. Any fraud, theft or possession, receipt, sale or transportation of stolen property or other contraband, or gambling or prostitution or narcotics, that occurs in more than one county or that occurs in one county and affects the residents of another county or that may be prosecuted by more than one county attorney.
3. 3. Perjury, false swearing or unsworn falsification, or any violation of title 13, chapter 28 in connection with any state grand jury proceeding, committed by any person testifying before it or in any trial or other proceeding involving any indictment returned by a state grand jury.
4. 4. Any perjury by subornation or attempted perjury by subornation relating to testimony before it or in any trial or other proceeding involving any indictment returned by a state grand jury.
5. 5. Any violation of title 13, chapter 23 or section 38-421 or 39-161.
6. 6. Any violation of title 13, chapter 35.1 if committed using a computer or network as defined in section 13-2301 and if any part of the conduct either:
  1. (a) Occurs in more than one county, state or country.
  2. (b) Affects the residents of another county, state or country.
  3. (c) May be prosecuted by more than one county, state or country.
7. 7. Any violation of title 13 or 46 if the victim is a vulnerable adult as defined in section 13-3623 or 46-451.
8. 8. Any criminal wrongdoing that is referred in writing by a county attorney and that is accepted in writing by the attorney general.
C. If a state grand jury, pursuant to an investigation under subsection B of this section, learns of an offense for which it lacks jurisdiction to indict, the grand jury shall direct the attorney general to inform the appropriate prosecutorial authority.
D. This article does not limit the jurisdiction of the county grand juries or county attorneys, nor shall an investigation by a state grand jury be deemed preemptive of a previously instituted investigation by another grand jury or agency having jurisdiction under the same subject matter unless good cause is shown.