Section 3 in The Assam District and Sessions Judges Establishment (Ministerial) Services Rules, 1987
3. Service.
(1)The Service shall comprise of the following categories of posts:(i)Sheristadar of District and Sessions Judge(ii)Sheristadar of Additional District and Sessions Judge.(iii)Sheristadar of Assistant District and Sessions Judge.(iv)Head Assistant.(v)Supervisory Assistant/Sheristadar of Munsiff/Upper- Division Assistant.(vi)Lower Division Assistant.(2)Each of the categories of posts in sub-rule (1) shall form an independent Cadre. Members of a lower cadre shall have no claim for appointment to any of the higher cadres except in accordance with the provisions made in these rules.
