955.11—General requirements.
To qualify for an OSM blaster certificate, a person shall:
(a)
Be at least 20 years old prior to submitting an application, and at least 21 years old prior to the grant of a certificate;
(b)
In the 3 years prior to submitting an application have been qualified and worked as a blaster or the equivalent, or have worked under the direction of a blaster or the equivalent, for the following cumulative length of time:
(c)
For certificate issuance or reissuance, have received on-the-job training, completed a training course, and obtained satisfactory evidence of having completed training, as provided in § 955.12 ;
(d)
Be competent, possess practical knowledge of blasting techniques, understand the hazards involved in the use of explosives, and exhibit a pattern of conduct consistent with the acceptance of responsibility for blasting operations;