Ariz. Admin. Code § R11-1-338
Timber in mine entrances shall be fire retardant for at least 200 feet inside the mine portal or collar, or the mine entrance shall be provided with fire protection adequate to control a fire for at least 200 feet inside the mine portal or collar.
Former Section R11-1-1183 renumbered and amended as Section R11-1-338 effective August 18, 1980 (Supp. 80-4).