Section 3(4)(d) in The Bureau of Indian Standards (Appointment, Terms and Conditions of Service of Director-General) Rules, 1987
(d)if a candidate is an employee of a Public Sector Undertaking or Autonomous Body, he shall have the educational qualifications and experience as specified in clauses (a) and (b) and at least two years regular service in a post with Pay Band-4: Rs. 37400-67000 plus Grade Pay of Rs. 10000 or equivalent and at least two years experience in senior management level for the candidate working in Private Sector;