20.—(1) This Part applies where—
(a)notice of acceptance has been given; and
(b)the Welsh Ministers determine that the application or any matter is to be considered in whole or in part by way of a hearing.
(2) This Part also applies where—
(a)the Welsh Ministers have made a determination that all or part the application is to be considered on the basis of written representations or inquiry;
(b)they subsequently vary that determination such that the application or parts of the application is or are to be considered on the basis of a hearing; and
(c)the Welsh Ministers have caused a hearing to be held pursuant to regulation 18(4),
to such extent as the Welsh Ministers may specify having regard to any steps already taken in relation to the application.