57.—(1) Subject to the following provisions of this paragraph, the undertaker must pay to WPD the proper and reasonable expenses reasonably incurred by WPD in, or in connection with, the inspection, removal, diversion, alteration or protection of any apparatus, the construction of any alternative apparatus and the acquisition or grant of alternative rights for the alternative apparatus, arising as a result of the powers conferred upon the undertaker pursuant to this Order.
(2) The value of any apparatus removed under the provisions of this Part of this Schedule must be deducted from any sum payable under sub-paragraph (1), that value being calculated after removal.
(3) If in accordance with the provisions of this Part of this Schedule WPD requires that alternative apparatus of better type, of greater capacity, of greater dimensions or at a greater depth is necessary in substitution for existing apparatus which for WPD’s network requirements is over and above what is necessary as a consequence of and for the purpose of the authorised development, WPD shall reduce the cost of such additional requirements from the amount payable by the undertaker pursuant to sub-paragraph (1).
(4) For the purposes of sub–paragraph (3)—
(a)an extension of apparatus to a length greater than the length of existing apparatus is not to be treated as a placing of apparatus of greater dimensions than those of the existing apparatus; and
(b)where the provision of a joint in a cable is agreed, or is determined to be necessary, the consequential provision of a jointing chamber or of a manhole is to be treated as if it also had been agreed or had been so determined.
(5) An amount which apart from this sub-paragraph would be payable to a utility undertaker in respect of works by virtue of sub-paragraph (1), if the works include the placing of apparatus provided in substitution for apparatus placed more than 7 years and 6 months earlier so as to confer on the utility undertaker any financial benefit by deferment of the time for renewal of the apparatus in the ordinary course, is to be reduced by the amount which represents that benefit.