MSHA - Code of Federal Regulations - 30 CFR 27.7
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MSHA - Title 30 CFR
30 CFR § 27.7
Certification plate or label.

A certified methane-monitoring system or component thereof shall be identified with a certification plate or label which is attached to the system or component in a manner acceptable to MSHA. The method of attachment shall not impair the explosion-proof characteristics of any enclosure. The plate or label shall be of serviceable material, acceptable to MSHA, and shall contain the following inscription with spaces for appropriate identification of the system or component and assigned certificate number:

Manufacturer's Name ---------------------------------------------------------

Description -----------------------------------------------------------------

Model or Type No ------------------------------------------------------------

Certified as complying with the applicable requirements of Schedule 32A. ----

Certificate No --------------------------------------------------------------