Metal Detecting in Arizona

1. The rule, in full

Arizona – THERE IS NO STATE RULE

This is the first state in the project with no metal detecting rule at all, and it needs saying plainly because every aggregator reports Arizona as prohibited.

Read from the consolidated Arizona Administrative Code published by the Secretary of State at apps.azsos.gov, Title 12 Chapter 8 (Arizona State Parks Board) in full, parsed locally. First read 19 Sep 2026; re-read in full and re-counted 4 Oct 2026, with the same result.

What was checked. The full consolidated Arizona Administrative Code, Title 12, Chapter 8 (Arizona State Parks Board), Supp. 25-1, dated 31 March 2025, downloaded from apps.azsos.gov and parsed locally – 81,536 characters covering R12-8-101 through R12-8-126 across three Articles.

The 4 Oct 2026 re-read confirmed it, and widened the search terms. The chapter was searched again for "metal detect", "detector", "treasure", "artifact", "relic" and "excavat". All six: zero occurrences. R12-8-103 is quoted below word for word as it stands in the code, with its historical note: amended by final rulemaking at 13 A.A.R. 1115, effective 5 May 2007.

Result: zero occurrences of "metal", "detect", "artifact" or "excavat". There is no metal detecting rule in Arizona's administrative code. The closest provision is:

R12-8-103. Vandalism. "Within a state park, a person shall not deface, injure, destroy, remove, or use, without authority, any: 1. Public facility or property; 2. Wildlife, plant, or animal; or 3. Archaeological, geological, or historical object."

That reaches removing an archaeological or historical object from a state park. It does not mention detecting, and it does not reach municipal land.

What the prohibition actually is. Arizona State Parks' own FAQ says:

"No. In order to conserve and protect the resources of the parks, we do not allow metal detecting."

No rule or statute is cited, because there is none to cite. This is agency policy, enforceable as a condition of entry under R12-8-102 (Permission to Enter or Remain in a State Park), not a codified prohibition. The entry must say which it is. "Arizona State Parks does not allow metal detecting as a matter of published policy" is true; "metal detecting is prohibited by Arizona Administrative Code R12-8-xxx" is not, and there is no section number that makes it so.

The statutes were checked for municipal reach. Arizona stays out, and the reason is worth recording because the near-miss is instructive.

A.R.S. 41-841(A): "On lands owned or controlled by this state or any agency of this state a person shall not knowingly excavate in or upon any historic or prehistoric ruin, burial ground, archaeological or vertebrate paleontological site…"

State land only. Counties and municipalities are not named. Note 41-841(B) defines "archaeological specimen" as at least one hundred years old and expressly excludes "arrowheads, coins or bottles" – a carve-out worth quoting, because it covers most of what a detectorist actually finds.

The trap. Implementing rules and secondary sources circulate a definition reading "'Lands owned or controlled by the State' means lands owned or controlled by the State of Arizona or by any agency, instrumentality, or political subdivision of the State of Arizona, including any county or municipal corporation." That phrasing tracks A.R.S. 41-844(A), which does reach "any lands owned or controlled by this state, by any public agency or institution of the state, or by any county or municipal corporation within the state" – but 41-844 is a duty to report, imposed on "[a] person in charge of any survey, excavation, construction or other like activity", not a prohibition. Carrying that definition across to 41-841 would put Arizona in the political-subdivision set wrongly. It is the New Mexico check run in reverse and coming out the other way, which is why both had to be read.

One live point for the Arizona page. 41-844(A)'s reporting duty runs to anything "at least fifty years old" discovered in the course of a survey or excavation on state, county or municipal land. Whether a detectorist digging a hole is "in charge of … excavation" is untested and should not be asserted either way, but the fifty-year figure belongs in the ARPA explainer's list of genuine fifty-year rules, since it is a real one and will be confused with the ARPA hundred-year threshold.

A.R.S. 41-865 is inverted and will be misread. It requires the museum director's written permission to disturb human remains on lands "other than" state, agency, county or municipal land – that is, on private land. Do not quote it as though it governed public parks.

Sources: apps.azsos.gov Title_12/12-08.pdf (Supp. 25-1), parsed locally; azleg.gov/ars/41/00841, 00842, 00844, 00865; azstateparks.com FAQ. Checked 19 Sep 2026.

2. Cities in Arizona that publish a rule

4 cities in Arizona publish a rule we can quote, out of 44 checked.

Of the 44 checked, 29 had pages on the city’s own site that we found and read. For the other 15 we could not locate a municipal source, so nothing is claimed about them either way.

3. County rules

Awaiting review. None of the city or county rows publishes until its status is set and its quotation chosen by hand.

4. Cities checked - no published rule

Awaiting review. None of the city or county rows publishes until its status is set and its quotation chosen by hand.