Section 3(1)(a) in The Assam Technical Education Service Rules, 1981
(a)Class I. - It shall include cadres of-(i)Director.(ii)Principal, Engineering Colleges.(iii)Professor, Engineering College ;(iv)Assistant Professor, Engineering College ;(v)Joint Director/Principal, Polytechnic/Controller of Examination.(vi)Workshop Superintendent, Engineering College.(vii)Head of Department, Polytechnic.(viii)Lecturer, Engineering College.