MSHA - Code of Federal Regulations - 30 CFR 15.9
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MSHA - Title 30 CFR
30 CFR § 15.9
Disclosure of information.

(a) All information concerning product specifications and performance submitted to MSHA by the applicant shall be considered proprietary information.

(b) MSHA will notify the applicants of requests for disclosure of information concerning its explosives or sheathed explosive units and shall give the applicant an opportunity to provide MSHA with a statement of its position prior to any disclosure.