Section 9 in The Orissa Mining and Geology Service Rules, 1976
9.
Promotions to posts of Senior Grade in [Group-A] [Substituted vide O.G.No. 4 dated 26.1.2007.] of Mineral Administration and Geological Survey and Exploration Wings shall be made from among the members of the Junior Grade in [Group-A] [Substituted vide O.G.No. 4 dated 26.1.2007.] of the respective wings in consultation with the Commission :Provided that no member of the Junior Grade shall be eligible for promotion to the Senior Grade unless he has completed seven years of service in the Junior Grade.
