Section 34(2)(e) in The Goa, Daman and Diu School Education Rules, 1986
(e)If there are some teachers who entered the service as undergraduate/S. S. C. trained teachers and placed in the graduate category on improving qualifications, and if the situation demands that their services are required to be terminated, they shall be given option to go back to their original category of under-graduate teachers, and on their doing so, the services of the junior most under-graduate teacher shall be terminated.