StacksVerified U.S. regulatory reference

30 CFR §33.22

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)A unit or system may be designed for use in connection with percussion and/or rotary drilling in any combination of the following drilling positions: (1) Vertically upward, (2) upward at angles to the vertical, (3) horizontally, and (4) downward.
  2. (b)Dust-collector units may be designed for use with specific drilling equipment or at specific drilling speeds.