Section 6(1)(b) in The Orissa Mining and Geology Service Rules, 1976
(b)Promotion to [Group-B] [Substituted vide O.G.No. 4 dated 26.1.2007.] posts in the Mineral Administration Wing shall ordinarily be made from among the officers holding the following posts and have completed five years of service in the said posts, namely :(i)Assistant Mining Officer;(ii)Chief Surveyor; and(iii)Such other posts as may be declared by Government from time to time to be of equivalent status :