CFR›Title 30›Chapter I›Part 15›Subpart B ContainsSections 15.20–15.22CorpusDaily eCFRDisplayed edition2026-09-24Last updated2026-09-24 Subpart B—Requirements for Approval of Explosives Sections 15.20 § 15.20 Technical requirements. 15.21 § 15.21 Tolerances for ingredients. 15.22 § 15.22 Tolerances for performance, wrapper, and specific gravity. Previous A Subpart A—General Provisions Next C Subpart C—Requirements for Approval of Sheathed Explosive Units or Other Explosive Units Designed to be Fired Outside the Confines of a Borehole