16. A person who on or before 1 April 2003 —
(a)was employed as a teacher at a relevant school in England or Wales; and
(b)either —
(i)had successfully completed a course of initial training for teachers in schools at an educational institution in Northern Ireland, or
(ii)had been awarded confirmation of recognition as a teacher in schools in Northern Ireland by the Northern Ireland Department of Education, that confirmation not having been withdrawn at any time subsequent to the award.