Section 27(1) in The Boiler Operation Engineers' Rules, 2011
(1)No candidate shall be admitted to an examination who cannot produce satisfactory testimonials certifying his experience, ability, and good conduct for the whole period of his qualifying service or any unaccounted break in the period of qualifying service. Such testimonials shall clearly state the capacity in which candidate was employed, whether as an Apprentice Engineer, Supervisor, Assistant Engineer etc. and the periods of such employment stating the dates between which candidate was so employed.
