{"data":{"id":"us/30-cfr-15.3","jurisdiction":"us","citation":"30 CFR 15.3","heading":"Observers at tests and evaluation.","body":"Only personnel of MSHA, designees of MSHA, representatives of the applicant, and such other persons as agreed upon by MSHA and the applicant shall be present during tests and evaluations conducted under this part.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS","PART 15—REQUIREMENTS FOR APPROVAL OF EXPLOSIVES AND SHEATHED EXPLOSIVE UNITS","Subpart A—General Provisions"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"3ce368a352f8b2ba5b2b53133eab46ec934ad5cddec5f59d168e454f712b4ce0","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-15.2","next":"us/30-cfr-15.4"},"notice":"GroundRules: Original legal text. Not legal advice."}