When mechanical haulage is in an underground mine, the tracks, roadbeds, rails, joints, switches and frogs shall be constructed, installed, bonded and maintained in a manner consistent with the speed and type of haulage operation being conducted.
Tracks and roadbeds; maintenance underground
A.R.S. § 27-349 — under Hoists, Shafts and Underground Operations.
A.R.S. § 27-349