Section 3(1)(b) in The Chief Inspectors, Deputy Chief Inspectors and Inspectors (Qualification and Experience) Rules, 2012
(b)Ten years experience in a managerial capacity in the design, construction, erection, operation, testing, repair, maintenance or inspection of boilers or in the implementation of the Boilers Act, 1923 and rules and regulations framed thereunder; or minimum four years experience as Deputy Chief Inspector; or minimum eight years total experience as Deputy Chief Inspector and as Inspector; or minimum eight years experience as Inspector.