Section 11(2) in The Assam Factories Service Rules, 1990
(2)Subject to suitability as may be decided by the Board and by the Appointing Authority/Commission as set forth in Rule 12 and also subject to possessing qualification and experience as prescribed hereinafter, an officer shall be eligible for promotion from one post to another of the service in the manner provided below:(a)From Joint Chief Inspector of Factories to Chief Inspector of Factories.(b)From Senior Inspector of Factories to Joint Chief Inspector of Factories.(c)From Inspector of Factories to Senior Inspector of Factories.
