Ariz. Admin. Code § R11-1-660
Unless the operator is otherwise protected, slushers in excess of 10 horsepower shall be provided with backlash guards. All slushers shall be equipped with rollers and drum covers and anchored securely before slushing operations are started.
Former Section R11-1-532 renumbered as Section R11-1-660 effective August 18, 1980 (Supp. 80-4).