The officer who, immediately before the commencement of this Order, was deemed to have been, or had been, appointed as Commissioner of Valuation for Northern Ireland shall be deemed to have been appointed under Article 36 as Commissioner; and the officer who, immediately before that commencement, was exercising the functions of Boundary Surveyor by virtue of the assignment mentioned in the 1972 Order, Schedule 18, Part I, paragraph 13, shall continue so to exercise those functions.