Any certificate of competency issued pursuant to the provisions of this article shall become null and void if the certificate holder fails to be actively employed in the coal mining industry for a period of five years. This section shall not apply to federal coal mine inspectors.
C.R.S. § 34-22-108
Expiration of certificates
Digitized from: Public.Law — Colorado Revised Statutes. Reproduced from public-domain Colorado statutes; confirm against the official source for the current text. Not legal advice.