A.R.S. § 27-363: Danger signals; visitors

A. Owners or operators shall place warning signs or other warning notices at the entrance to working places deemed dangerous, and at the entrance to old or abandoned workings of active mines, and no person other than those authorized by the operator shall remove or go beyond a caution-board, warning sign or danger signal so placed.

B. Visitors shall not be allowed underground unless accompanied by the operator or his agent.