Section 7(2) in The M.P. Boiler Operation Engineers' Rules, 1968
(2)An operation Engineer of a boiler or boilers for which a certificate of proficiency is required may be relieved of charge by a person holding a first class certificate of competency as an attendant under the Madhya Pradesh Boiler Attendant's Rules, 1958, in any one day for not more than two periods, the total of which does not exceed two hours.
