Section 80(4) in The Goa, Daman and Diu School Education Rules, 1986
(4)In case of a secondary school, the school shall be eligible for the post of a regular cadre Headmaster of a secondary school when Std. VIII is opened, provided that when the same middle school is up-graded to a secondary school, the post of middle school cadre headmaster shall be abolished when a regular post of Headmaster of secondary school is sanctioned.
