43.Subsections (3) and (4) make amendments to paragraphs 18 and 19 respectively of Chapter 2 about the matters to which site owners must have particular regard, and the costs to be disregarded, when determining the amount of the new pitch fee. The existing provision in paragraph 18(1)(b) of Chapter 2 (so far as it applies in relation to England) which requires site owners to have regard to any decrease in the amenity of the site since the last review date is replaced with two broader requirements contained in new paragraphs 18(1)(aa) and 18(1)(ab) which are inserted by subsection (3)(a). Similarly, the existing provision in paragraph 18(1)(c) (so far as it applies in relation to England) which allows site owners to take into account the effect of any enactment which has come into force since the last review date when determining the new pitch fee, is replaced with new paragraph 18(1)(b) which specifies that site owners may only take into account any direct effect on the costs payable by the owner in relation to the maintenance or management of the site of any enactment that has come into force since the last review date. The amendments made by subsections (3)(f) and (4) make it clear that site owners may not take into account any costs incurred in complying with the requirements inserted into the MHA 1983 by this Bill when determining pitch fees.