30 CFR 57.8525 - Main fan maintenance.
Main fans shall be maintained according to either the manufacturer's recommendations or a written periodic schedule adopted by the operator which shall be available at the operation on request of the Secretary or his authorized representative.
[50 FR 4082, Jan. 29, 1985, as amended at 60 FR 33723, June 29, 1995]
Title 30 published on 2014-07-01.
No entries appear in the Federal Register after this date, for 30 CFR Part 57.