CFR›Title 30›Chapter I›Part 57›Subpart E›Subject Group General Requirements—Underground Only ContainsSection 57.6960CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Sections 57.6960 § 57.6960 Mixing of explosive material. Previous General Requirements—Surface and Underground General Requirements—Surface and Underground Next Maintenance—Surface and Underground Maintenance—Surface and Underground