by the university. We may mention at this very stage that similar letters were addressed by the State Government to the university on 22.05.2018 and 09.06.2021, directing that the procedure contemplated under the 2001 Rules must be followed for filling up the vacancies of SC/ST and other backward classes in the university. With these letters, the issue relating to the 13legality and validity of the university’s advertisement is beyond doubt. 20. While we reject the submission of Mr. Shailesh Madiyal that the advertisement declaring that the 2001 Rules will be the ‘Mode of Selection’, is a mistake, we also hold that the university is bound to comply with what is declared in its advertisement: the 2001 Rules will be the guiding principles for the selection in question. We state this for the following reasons. Firstly, there was no uncertainty left after the introduction of sub-Section (1A) to Sec. 4 of the Reservation Act, 1990, requiring an establishment, i.e., the university, to take