20.—(1) An administrator may at any time in writing—
(a)withdraw a notice of intent or a final notice in relation to a fixed monetary penalty;
(b)withdraw a notice of intent or final notice in relation to a variable monetary penalty or reduce the amount specified in the notice;
(c)withdraw a notice of intent or a final notice in relation to a non-monetary discretionary requirement or amend the steps specified in the notice so as to reduce the amount of work necessary to comply with the notice;
(d)withdraw a notice of intent in relation to a non-compliance penalty or reduce the amount specified in the notice;
(e)withdraw a non-compliance penalty notice or reduce the amount specified in the notice;
(f)withdraw an enforcement costs recovery notice or reduce the amount specified in the notice.
(2) An administrator must consult the seller in question before withdrawing or amending a notice under paragraph (1).
(3) But paragraph (2) does not apply in any case where it is impracticable to consult the seller concerned.