"Be that as it may, in our opinion, the delay of over two decades in applying for the correction of date of birth is ex facie fatal to the case of the respondent, notwithstanding the fact that there was no specific rule or order, framed or made, prescribing the period within which such application could be filed. It is trite that even in such a situation such an application should be filed which can be held to be reasonable. The application filed by the respondent 25 years after his induction into service, by no standards, can be held to be reasonable, more so when not a feeble attempt was made to explain the said delay. There is also no substance in the plea of the respondent that since Rule 84 of the M.P. Financial Code does not prescribe the time-limit within which an application is to be filed, the appellants were duty-bound to correct the clerical error in recording of his date of birth in the service book."