Section 17(1) in The Assam Economic and Statistical Service Rules, 1973
(1)The seniority of a member of the Service in a cadre shall be determined according to the order of merit in the Select List approved under Rule 7 (3) (d) or the list prepared under Rule 8 (5) if the member joins within 15 days of the order of appointment:Provided that in case a member of the Service is prevented from joining within the said period of 15 days by circumstances of a public nature or for reasons beyond his control the Government may extend it for a further period of 15 days. If the period is not so extended under Rule 13 his seniority shall be determined in accordance with the date of joining:Provided further that a member appointed by promotion in a year shall be senior to a member appointed by direct recruitment in the same year.
