Section 26(3) in The Assam Engineering (Irrigation Department) Service Rules, 1978
(3)A member of the service, possessing a degree in Civil/Mechanical/Electrical/Telecommunication/Electronic Engineering shall, if so required, be liable to serve in any defence service or posts connected with the defence of India, for a period of not less than 4 years including the period spent on training, if any :Provided that such person-(a)shall not be required to serve as aforesaid after the expiry of 10 years from the date of appointment;(b)shall not ordinarily be required to serve as aforesaid after attaining the age of 40 years.
