58.—(1) An operator shall take all reasonable steps to ensure that —
(a)
a trainee shotfirer at the blasting site does not, and is not required to, fire shots —
(i)
except when he is under the close personal supervision of a shotfirer; or
(ii)
unless the operator is satisfied that the trainee shotfirer has completed a suitable period of training and has appropriate practical experience; and
(b)
all shotfiring operations are carried out under the close personal supervision of the shotfirer.
(2) An operator shall ensure, in respect of every shotfirer or trainee shotfirer employed at a blasting site, that a record of the employment of the shotfirer or trainee shotfirer at the blasting site is maintained until the end of 3 years after the date of termination of the employment of the shotfirer or trainee shotfirer at the blasting site.