Section 13(1) in Indian Forest Service (Departmental Examination) Rules, 1989
(1)Any officer of the Indian Forest Service posted in the areas mentioned in Part I of Appendix II will have to pass the examination in the tribal language mentioned therein against the district in which he is posted at least by the lower standard, within a period of eighteen months from the date on which he is posted to that district. If he fails to do so, his increments will be stopped until such time as he passes the examination:Provided that if an officer is prevented from passing the examination by circumstances beyond his control the Head of the Forest Department may grant him such further time for passing the examination as he considers fit.
