Section 40(d) in Bihar Boilers Attendants' Rules, 1948
(d)produces from the head of an industrial or technical institution a certificate stating that he has completed a three years' course of training, one year of which must have been as an apprentice engineer in a steam power plant of a mill or factory or an engineering workshop where engines and boilers are repaired or made and in addition has served for not less than two years in sole working charge of a boiler of not less than 500 square feet of heating surface with a second class Boiler Attendant's Certificate.
