AZ SB1290

Requires federal employees who are not Arizona-certified peace officers to obtain written permission from the county sheriff before making arrests, searches, or seizures in the county, except for federal enclaves, witnessed crimes, close pursuit situations, and CBP/ICE officers.

Permits the sheriff or sheriff's designee to refuse permission for any reason they deem sufficient, with permission valid for 48 hours after being countersigned.

Requires written permission from the Arizona Attorney General instead of the sheriff when the target is a sheriff's employee, elected official, or has a close connection to the sheriff; requires a sworn statement of probable cause in the latter case.

Mandates county attorneys prosecute violations as kidnapping, trespass, theft, homicide, or other applicable crimes, and prohibits county attorneys from refusing to prosecute violations on pain of recall and prosecution for official misconduct.

Declares that any federal law authorizing federal employees to exercise county sheriff authority in Arizona is null, void, and of no effect in the state, pursuant to the Tenth Amendment.