According to the petitioner, she was given appointment order on 16.12.1984 and she joined the service in the afternoon of 01.01.1985. But, as seen from Rule 4 (a) of the Rules, a candidate selected under direct recruitment shall join duty in the post for which he or she is selected within 45 days from the date of receipt of the Appointment Order. Thus 45 days time is given for the candidates joining on first appointment under direct recruitment. However, as per Section 3 (i) of the Rules in Chapter – I, a person is said to be on duty when he or she is on joining time. It is further clarified that as per Rule 15 (b) of the Rules in Chapter - II, the seniority of a person in service class or category of post shall, unless he or she has been reduced to a lower rank as a punishment, be determined by the date of his or her first appointment to such service, class, category. Since the date of appointment seems to be the criteria as per above referred Rule 15(b) and the petitioner has joined the services within the joining time allowed by the Rules and she is deemed to be on duty with effect from 16.12.1984 and therefore it is deemed that the petitioner is in service from 16.12.1984. Therefore, the official respondents are directed to fix the seniority of the petitioner keeping in mind the date of her first appointment i.e. 16.12.1984.