Retained apparatus: protection  150 (10) The undertaker is not 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 Cadent notice as soon  as is reasonably practicable and a plan of those works and must—  (9) 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 unless otherwise agreed by Cadent and the undertaker  before commencing the execution of the authorised works, a new plan, instead of the plan  previously submitted, and having done so the provisions of this paragraph apply to and in respect  of the new plan.  (8) If Cadent in accordance with sub-paragraph (5) or (7) 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 78 to 80 and 83 to 85 apply as if the  removal of the apparatus had been required by the undertaker under paragraph 84(2).  (7) Where Cadent 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 Cadent’s satisfaction prior to the commencement of any authorised works (or any  relevant part thereof) for which protective works are required and Cadent must give 56 days’  notice of such works from the date of submission of a plan pursuant to this paragraph (except in an  emergency).  (6) Works to which this paragraph applies must only be executed in accordance with the plan,  submitted under sub-paragraph (1) or as relevant sub-paragraph (4), as approved or as amended  from time to time by agreement between the undertaker and Cadent and in accordance with such  reasonable requirements as may be made in accordance with sub-paragraph (5) or (7) by Cadent  for the alteration or otherwise for the protection of the apparatus, or for securing access to it, and  Cadent is entitled to watch and inspect the execution of those works.  (5) In relation to any work to which sub-paragraph (1) or (2) applies, Cadent may require such  modifications to be made to the plans as may be reasonably necessary for the purpose of securing  its apparatus against interference or risk of damage or for the purpose of providing or securing  proper and convenient means of access to any apparatus.  (4) Any approval of Cadent required under sub-paragraph (2)—  (3) The undertaker must not commence any works to which sub-paragraphs (1) and (2) apply  until Cadent has given written approval of the plan so submitted.  (2) The plan or plans to be submitted to Cadent under sub-paragraph (1) must include a method  statement which describes—  86. —(1) Not less than 56 days (or such time period as may be agreed between Cadent and the  undertaker) before the commencement of any specified works the undertaker must submit to  Cadent a plan or plans and, if reasonably required by Cadent, a ground monitoring scheme in  respect of those works.  (a) the exact position of the works;  (b) the level at which these are proposed to be constructed or renewed;  (c) the manner of their construction or renewal including details of excavation, positioning of  plant etc.;  (d) the position of all apparatus;  (e) by way of detailed drawings, every alteration proposed to be made to or close to any such  apparatus; and  (f) any intended maintenance regimes.  (a) may be given subject to reasonable conditions for any purpose mentioned in sub- paragraph (5) or (7); and  (b) must not be unreasonably withheld. 