6.—(1) Where two or more competent persons may have concurrent jurisdiction to exercise Part 1 functions in respect of a case, no competent person shall exercise any prescribed functions in respect of that case before agreement has been reached in accordance with regulation 4(2) or a determination has been made in accordance with regulation 5(3)(a) as to which competent person is to exercise Part 1 functions in respect of that case.
(2) Subject to regulations 7 and 8, once agreement has been reached in accordance with regulation 4(2) or a determination has been made in accordance with regulation 5(3)(a) as to which competent person is to exercise Part 1 functions in respect of a case, no other competent person shall exercise any Part 1 functions in respect of that case.