30 CFR § 33.36
Method of drilling; combination unit or dust-collecting system.
Drilling shall be conducted in accordance with the applicant's specifications
and operating instructions. If special drill bits or drill steel are
required, they shall be furnished to MSHA by the applicant. Otherwise the
drill bit and drill steel requirements stated in paragraphs (b) and (c) of
shall be complied with for all types of
combination units or dust-collecting systems.