(8) Where National Grid requires any protective works to be carried out by itself or by the  undertaker (whether of a temporary or permanent nature) such protective works, inclusive of any  measures or schemes required and approved as part of the plan approved pursuant to this  paragraph, must be carried out to National Grid’s satisfaction prior to the commencement of any  part of the authorised development (or any relevant part thereof) for which protective works are  required and National Grid shall give 56 days’ notice of such works from the date of submission  of a plan pursuant to this paragraph (except in an emergency).  (9) If National Grid in accordance with sub-paragraph (6) or (8) and in consequence of the  works proposed by the undertaker, reasonably requires the removal of any apparatus and gives  written notice to the undertaker of that requirement, paragraphs 66 to 68 and 71 to 73 apply as if  the removal of the apparatus had been required by the undertaker under paragraph 72(2)).  (10) Nothing in this paragraph precludes the undertaker from submitting at any time or from  time to time, but in no case less than 56 days before commencing the execution of the authorised  development, a new plan, instead of the plan previously submitted, and having done so the  provisions of this paragraph shall apply to and in respect of the new plan.  (11) The undertaker will not be required to comply with sub-paragraph (1) where it needs to  carry out emergency works as defined in the 1991 Act, but in that case it must give to National  Grid notice as soon as is reasonably practicable and a plan of those works and must—  (12) At all times when carrying out any works authorised under the Order, the undertaker must  comply with the National Grid’s policies for development near overhead lines EN43-8 and HSE’s  guidance note 6 “Avoidance of Danger from Overhead Lines”.  75. —(1) Subject to the following provisions of this paragraph, the undertaker must pay to  National Grid on demand all charges, costs and expenses reasonably anticipated or incurred by  National Grid in, or in connection with, the inspection, removal, relaying or replacing, alteration  or protection of any apparatus or the construction of any new or alternative apparatus which may  be required in consequence of the execution of any part of the authorised development as referred  to in this Part of this Schedule including without limitation—  98 (a) any costs reasonably incurred by or compensation properly paid by National Grid in  connection with the acquisition of rights or the exercise of statutory powers for such  apparatus including without limitation all costs incurred by National Grid as a  consequence of National Grid;  (i) using its own compulsory purchase powers to acquire any necessary rights under  paragraph 72(3); and/or  (ii) exercising any compulsory purchase powers in the Order transferred to or benefitting  National Grid;  (b) in connection with the cost of the carrying out of any diversion work or the provision of  any alternative apparatus;  (c) the cutting off of any apparatus from any other apparatus or the making safe of redundant  apparatus;  (d) the approval of plans;  (e) the carrying out of protective works, plus a capitalised sum to cover the cost of  maintaining and renewing permanent protective works;  (f) the survey of any land, apparatus or works, the inspection and monitoring of works or the  installation or removal of any temporary works reasonably necessary in consequence of  the execution of any such works referred to in this Part of this Schedule.  (a) comply with sub-paragraphs (6), (7) and (8) insofar as is reasonably practicable in the  circumstances; and  (b) comply with paragraph 77 at all times.  Expenses 