StacksVerified U.S. regulatory reference

30 CFR §18.30

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)MSHA may waive testing of materials for windows or lenses except headlight lenses. When tested, material for windows or lenses shall meet the test requirements prescribed in § 18.66 and shall be sealed in place or provided with flange joints in accordance with § 18.31.
  2. (b)Windows or lenses shall be protected from mechanical damage by structural design, location, or guarding. Windows or lenses, other than headlight lenses, having an exposed area greater than 8 square inches, shall be provided with guarding or equivalent.