PART 4 FOR THE PROTECTION OF RAILWAY INTERESTS  ( a ) 1993 c. 43. As amended by paragraphs 1 and 4 of Schedule 17 to the Transport Act 2000 (c. 38), paragraphs 1 and 5 of  Schedule 2 to the Railways and Transport Safety Act 2003 (c. 20), paragraph 3 of Schedule 1, and Schedule 13, to the  Railways Act 2005 (c. 14) and S.I. 2015/1682.  ( b ) 2006 c. 46.  (a) co-operate with the undertaker with a view to avoiding undue delay and securing  conformity as between any plans approved by the engineer and requirements emanating  from those procedures; and  (b) any easement or other property interest held or used by Network Rail for or connected  with the purposes of such railway or works, apparatus or equipment; and  (a) any station, land, works, apparatus and equipment belonging to Network Rail or  connected with any such railway; and  31.  The provisions of this Part of this Schedule have effect, unless otherwise agreed in writing  between the undertaker and Network Rail, and in the case of paragraph 45, any other person on  whom rights or obligations are conferred by that paragraph.  32.  In this Part of this Schedule—  “construction” includes execution, placing, alteration and reconstruction and “construct” and  “constructed” have corresponding meanings;  “the engineer” means an engineer appointed by Network Rail for the purposes of this Order;  “network licence” means the network licence, as the same is amended from time to time,  granted to Network Rail Infrastructure Limited by the Secretary of State in exercise of his  powers under section 8 (licences) of the Railways Act l993( a );  “Network Rail” means Network Rail Infrastructure Limited (company number 0204587,  whose registered office is at 1 Eversholt Street, London, NW1 2DN) and any associated  company of Network Rail Infrastructure Limited which holds property for railway purposes,  and for the purpose of this definition “associated company” means any company which is  (within the meaning of section 1159 (meaning of “subsidiary” etc) of the Companies Act  2006( b )) the holding company of Network Rail Infrastructure Limited, a subsidiary of  Network Rail Infrastructure Limited or another subsidiary of the holding company of Network  Rail Infrastructure Limited;  “plans” includes sections, designs, design data, software, drawings, specifications, soil reports,  calculations, descriptions (including descriptions of methods of construction), staging  proposals, programmes and details of the extent, timing and duration of any proposed  occupation of railway property;  “protective works” means any works specified by the engineer under paragraph 35(4);  “railway operational procedures” means procedures specified under any access agreement (as  defined in the Railways Act 1993) or station lease;  “railway property” means any railway belonging to Network Rail and—  “specified work” means so much of any of the authorised development as is or is to be situated  upon, across, under, over or within 15 metres of, or may in any way adversely affect, railway  property.  33. —(1) Where under this Part of this Schedule Network Rail is required to give its consent or  approval in respect of any matter, that consent or approval is subject to the condition that Network  Rail complies with any relevant railway operational procedures and any obligations under its  network licence or under statute.  (2) In so far as any specified work or the acquisition or use of railway property or rights over  railway property is or may be subject to railway operational procedures, Network Rail must—  134