143. Without prejudice to the generality of the protective provisions in this Part of the Schedule, Northern Powergrid must from time to time submit to the undertaker estimates of reasonable costs and expenses it expects to incur in relation to the implementation of any diversions or relocation of apparatus contemplated under this Part of the Schedule including without limitation—
(a)in assessing and preparing a design for its apparatus to address and accommodate the proposals of the undertaker under paragraph 139;
(b)costs incurred in fulfilling its obligations in paragraph 136(3);
(c)fees incurred in settling and completing and registering any documentation to secure rights for its diverted or relocated apparatus; and
(d)costs and expenses of contractors required to undertake any works for which Northern Powergrid is responsible and of purchasing the necessary cabling and associated apparatus,
provided that Northern Powergrid must use reasonable endeavours to minimise to a proper and reasonable level any charges, costs, fees and expenses to the extent that they are incurred.