approval of such authority, provided that the request for withdrawal shall be made before the intended date of his retirement. Notwithstanding the ratio of Gurdarshan Kaur Sandhu (Supra) the language employed in sub rule (4) and its proviso is simple and clear and brooks no ambiguity. It is trite that the proviso is to be read as carving out an exception to the main statute and has to be read as such. In other words, the petitioner could have submitted a notice for withdrawal of his application for voluntary retirement anytime before 18.03.2013, when the acceptance of his voluntary retirement became effective. The petitioner had retired from government service on 18.03.2013, thus the question of him being reinstated in service does not arise at all. 15. That said, we would examine the effect and impact of Rule 88 of the Pension Rules. Plainly, the provisions of Rule 88 leave no manner of doubt that the same is in the nature of a residuary power of the Competent Authority to relax the operation of any of the Pension Rules, if they cause undue hardship in a particular case. It is also manifest that the power vested is absolutely discretionary and not mandatory. The Competent Authority has been given enough room for movement to exercise administrative power in the interests of the administration and to meet exigencies. Assuming the authorities have indeed exercised such power in some cases, that by itself would not confer any right upon the petitioner to seek similar treatment. Clearly, Rule 88 does not envisage any equal rights to the government servants and has to be applied on a case to case basis. The petitioner can neither allege discrimination nor can seek parity on that basis at all. Moreover, having due regard to the facts of the present case and the proper exercise of Rule 48-A by the Competent Authority,