30 CFR § 27.10
Conduct of investigations, tests, and demonstrations.
MSHA shall hold as confidential and shall not disclose principles or
patentable features, nor shall it disclose any details of drawings,
specifications, or related materials. The conduct of all investigations,
tests, and demonstrations shall be under the direction and control of MSHA,
and any other persons shall be present only as observers, except as noted in
paragraph (b) of this section.
(a) Prior to the issuance of a letter of certification, necessary
Government personnel, representatives of the applicant, and such other
persons as are mutually agreed upon may observe the investigations or
(b) When requested by MSHA the applicant shall provide assistance in
assembling or disassembling components, subassemblies, or assemblies for
testing, preparing components, subassemblies, or assemblies for testing, and
operating the system during the tests.
(c) After the issuance of a letter of certification, MSHA may conduct
such public demonstrations and tests of the certified methane-monitoring
system or components as it deems appropriate.
[31 FR 10607, Aug. 9, 1966, as amended at 39 FR 24003, June 28, 1974]