“7.3. Every person newly appointed to a service or a post under Government should at the time of appointment declare the date of his birth by the Christian era with confirmatory evidence as far as possible, confirmatory documentary evidence such as Matriculation Certificate, Municipal birth certificate and so on. If the exact date is not known as approximate date may be given. The actual date or the assumed date, determined under note 1 below should be recorded in the History of Service, Service Book, or any other record, that may be kept in respect of the Government employee’s service under Government and once recorded, it cannot be altered except in the case of a clerical error, without the previous orders of Government.”