Belt air course.

Belt air course. The entry in which a belt is located and any adjacent entry not separated from the belt entry by permanent ventilation controls, including any entries in series with the belt entry, terminating at a return regulator, a section loading point, or the surface.

Source

30 CFR § 75.301

Scoping language

In addition to the applicable definitions in 75.2, the following definitions apply in this subpart.