Section 11A(ii) in The Assam Engineering (Flood Control Department) Service Rules, 1981
(ii)Subject to suitability as may be decided by the Board and by the Appointing Authority in consultation with the Commission, an officer belonging to the corresponding cadre of Senior Observer under the Director, River Research Station and possessing the qualification as set forth herein below shall be promoted to the cadre of River Research Assistant in the manner provided in Rule 13.
