Section 6(b) in The Punjab School Education Board Act, 1969
(b)he has an experience of teaching in any school, college or University established by law in India, or partly in one and partly in any other of the aforesaid institutions for a period of not less than twenty years, out of which he should have served as Principal of a college, or Registrar or Head of the Department of such a University for a period of not less than five years:
