Section 18(1) in The Assam Accounts Service Rules, 1963
(1)The Seniority of a member in the cadre of Accounts Officer appointed by promotion shall be determined according to the order of preference in the list referred to in sub-rule (3) of Rule 18, if he joins the appointment within 15 days from the date of receipt of the order or within the extended period as mentioned in Rule 14(5);
