extended to various work-charged employees like the petitioner-appellants, did not require any sanction from any authority before its release to work-charged employees because the Chief Engineer is fully competent. We further find that the circular dated 5.8.1968 issued by the State of Punjab converting grant of special increments to cash rewards to its employees could not have been made applicable to the petitioner-appellants because prior to 1996 the Punjab Civil Services Rules Volume-I Part-I were not applicable to them and they were to be governed by the Departmental Financial Rules. At stated above, under Rule 10.8 of the Departmental Financial Rules, the Chief Engineer was fully empowered to grant special increment to a person borne on work-charged establishment. It is also well settled principle of law that the executive instructions cannot override the powers of the authorities conferred upon them under the statutory Rules. Therefore, it is held that the Chief Engineer was competent to grant special increments under Rule 10.8 of the Departmental Financial Rules and the same could not have been withdrawn.