65An employer shall ensure that there is a sufficient number of employees on the surface who are trained in surface fire fighting procedures and the procedures required in the emergency preparedness plan referred to in section 64 and that
(a)
the names of the employees are posted in a conspicuous place,
(b)
the employees are tested for proficiency in the procedures at least once a year, and
(c)
a written report of the results of the test is made and kept on file.