Amendment of grounds of appeal and of additional material
6.—(1) The appellant may, with the leave of the Secretary of State, at any time before he receives notice under regulation 12(2) (of the time and place of the oral hearing), add to or amend the grounds of appeal and the Director may, with the leave of the Secretary of State, at any time before he receives such notice, add to or amend the additional material sent to the Secretary of State in accordance, in the case of the grounds, with regulation 4 or, in the case of the additional material, with regulation 5(2)(b).
(2) An appellant seeking leave of the Secretary of State to add to or amend his grounds of appeal or the Director seeking leave to add to or amend additional material under paragraph (1) must send a copy of every amendment and any document necessary to explain or to support that amendment or addition to the Secretary of State.
(3) The Secretary of State must not grant leave under paragraph (1) unless—
(a)she is satisfied that the amendment of, or addition to, the grounds or the new or amended additional material is capable of significantly affecting the outcome of the appeal; and
(b)she has afforded the appellant or the Director, as appropriate, an opportunity to make representations to her in writing on the proposed amendment, or addition, or on the new or amended additional material.
(4) Where the Secretary of State grants leave under paragraph (1) she may do so on such terms as she thinks fit.