20.—(1) Except where rule 15(2) (exceptions to disclosure) applies, following the receipt of an appellant’s reply, the Commission must file a list of any further material—
(a)which might reasonably be expected to assist that appellant’s case as disclosed by that appellant’s reply; and
(b)which is not mentioned in the list provided in accordance with rule 18(4)(a) (Commission’s response).
(2) Any list required to be filed under paragraph (1) must be filed so that it is received by the Tribunal no later than 14 days after the day on which the Commission received that appellant’s reply under rule 19(5) (appellant’s reply).
(3) At the same time as filing any list required by paragraph (1), the Commission must send a copy of that list to that appellant and any other party.