• Haryana Affiliated College (Security of Service) Rules, 1993 - A decision of the Committee constituted to appoint/select a Principal has been challenged by the petitioner and at the same time the petitioner claims a right to be appointed as Principal on the basis of the selection made by the said Committee being next in merit, the petition would be not maintainable in view of the principle of estoppel - Constitution of India, Article 226. (174) P.L.R.