which the Commissioner may issue can only be in furtherance of the provisions of the Act and the rules made thereunder, and not in derogation thereof. Administrative instructions can only be issued when the field is not covered by statutory Rules. Instructions/circulars, which the Commissioner can issue, may supplement but not supplant statutory rules. (State of Maharashtra v. Jagannath Achyut Karandikar[1] ; J & K Public Service Commission v. Narinder Mohan (Dr)[2] ; B.N. Nagarajan v. State of Mysor e[3] ) . Reliance placed by the petitioners on the circular issued by the Commissioner, to contend that they are entitled to remain in occupation of the shops on payment of rent of at least 1/3rd over and above the existing rent, is, therefore, misplaced. Sri N. Guru Gopal, learned counsel for the petitioners, would further contend that the Commissioner had given the benefit of the Circular dated 21.04.2010 to several other shops, and that a similar benefit ought to be given to the petitioner as, otherwise, it would result in discrimination. As noted hereinabove, administrative instructions can only supplement and not supplant statutory rules and, since the normal mode of grant of leasehold/license rights is by way of public auction, and the exception is only in cases where it is in the interest of the institutions, the Circular instructions issued by the Commissioner dated 21.04.2010 cannot be relied upon to the extent it runs contrary to the statutory rules in this regard. The mere fact that the statutory rules have not been uniformly applied and a few other shops have been given the benefit of extension of lease on payment of excess 1/3rd rent, would not entitle the petitioners to