Section 3(b) in The Bihar Forest Service Rules, 1953
(b)by promotion in accordance with the Rules contained in Part V of selected Rangers-(i)Who have obtained the Honours or the high standard certificate at the Forest College, Dehra Dun, or at any State Forest School or College, established for the training of Ranger students and who by unusual ability and industry in the course of their service as [Range Officers of Forests] [Omitted by S.O. 1313 dated 26.12.1989.] have proved themselves fit for promotion; and(ii)who have long service, tried ability and probity, irrespective of their educational qualifications:
