Rules & Regs
Where can you legally search, and keep what you find? The Code projects legal context for 113 jurisdictions per activity, straight from the legal repository.
Metal detecting — 105 source-cited, 8 research required
Magnet fishing — 0 source-cited, 113 research required
United States — federal authority
Transfers US title to abandoned, embedded (or Register-eligible) shipwrecks in state submerged lands to the state. Admiralty salvage & finds do NOT apply, you need state authorization.
Enforced via state permits/fines.
Source: legacy:fed.json#abandoned-shipwreck-act · 1987 · ASA · Research required
The workhorse. Bars excavating, removing, or trafficking any archaeological resource 100+ years old on federal & tribal land without a permit.
Up to 2 yrs + $20K (felony >$500); forfeiture.
Source: legacy:fed.json#archaeological-resources-protection-act · 1979 · ARPA · Research required
Protects objects of antiquity on federal land and lets the President declare national monuments. Largely superseded for enforcement by ARPA.
Up to $500 + 90 days.
Source: legacy:fed.json#antiquities-act · 1906 · Research required
Protects all US (and foreign, in US waters) sunken military ships & aircraft, perpetual title, war-grave protection. No disturbance without a permit.
Up to $100K/violation, per day.
Source: legacy:fed.json#sunken-military-craft-act · 2004 · SMCA · Research required
Procedural: any federally permitted undertaking must weigh effects on historic properties and consult SHPO/THPO.
Non-compliance can enjoin the project.
Source: legacy:fed.json#national-historic-preservation-act-106 · 1966 · NHPA · Research required
Strictly governs Native American human remains and cultural items on federal & tribal land. Removal generally prohibited; inadvertent discoveries must be reported.
Trafficking: up to 1 yr+ first offense.
Source: legacy:fed.json#nagpra · 1990 · Research required
For non-military, truly abandoned wrecks in federal/international waters. Salvage = award but owner keeps title; Finds = finder takes title, but courts presume against abandonment.
Litigated case-by-case.
Source: legacy:fed.json#admiralty-salvage-finds · Common law · Research required
NPS & Wildlife Refuges: detectors banned entirely. BLM / USFS / Army Corps: modern lost items OK in non-sensitive areas, but never artifacts 100+ yrs (ARPA).
36 CFR 2.1; ARPA on top everywhere.
Source: legacy:fed.json#federal-land-detecting-rules · By agency · Research required
United States — by state
Around the world
Full rules, permits, prohibited areas, and citations live on the per-activity pages: metal detecting · magnet fishing. Detail pages by state: state law index.