It is well settled that where the relevant Service Rules or the Rules governing the conditions of services provides for a particular thing, a simple Government Order is not sufficient to alter or modify the said thing or the Rules.
In Vijay Singh v. State of U.P., 2005 (2) AWC 1191 (FB), it was held in unequivocal terms that Statutory Rules cannot be set at naught by issuing executive instructions.
In Rajasthan State Industrial Development and Investment Corporation v. Subhash Sindhi Co-operative Housing Society, (2013) 5 SCC 427, it has been held that executive instructions which have no statutory force cannot override the law and any notice, circular, guidelines etc. which run contrary to the statutory laws cannot be enforced. Dr. Chandra Mohan Verma v. State of U.P., 2018 (128) ALR 384.