Time limit for commencement of the authorised development  Design of the authorised development  Code of construction practice  Landscaping scheme  4. —(1) No part of the authorised development may commence until a code of construction  practice for that part of the authorised development has been submitted to the county planning  authority by the undertaker following consultation with the Environment Agency, the harbour  authority and the local planning authority and the submitted code of construction practice has been  approved by the county planning authority.  (2) Any code of construction practice produced under sub-paragraph (1) must be in accordance  with the interim code of construction practice.  (3) The authorised development must be carried out in accordance with the code of construction  practice produced under sub-paragraph (1).  5. —(1) No part of the authorised development may commence until a written landscaping  scheme for the authorised development has been submitted to the county planning authority by the  undertaker following consultation with the local planning authority and the written landscaping  scheme has been approved in writing by the county planning authority.  (6) No part of the authorised development which comprises the construction or improvement of  a highway may commence until written details of those works have been submitted to and  approved by the county planning authority.  (7) For the purposes of paragraph (6) “written details” means—  (5) The authorised development must be designed and implemented in accordance with the final  version of the design guidance manual approved under sub-paragraph (2).  (4) The final version of the design guidance manual submitted under sub-paragraph (2) must be  in accordance with the interim design guidance manual.  (3) The county planning authority must consult the local planning authority before approving the  final version of the design guidance manual under sub-paragraph (2).  (2) Prior to the commencement of the authorised development the undertaker must submit to the  county planning authority a final version of the design guidance manual for approval.  3. —(1) The authorised development must be designed and implemented in general accordance  with the general arrangement plans.  2.  The authorised development must commence within 5 years of the date on which this Order  comes into force.  (a) highway cross-sections and long sections;  (b) details of earthworks, pavement construction, materials, carriageway layout, footways  and cycleways, road restraints, road markings, traffic signs, traffic signals, crossing  facilities, and street lighting;  (c) details of approach ramps, engineered fill, retaining structures, piles and foundations  where those details have not already been submitted by the undertaker to the county  planning authority as part of a scheme bridge approval in principle report pursuant to  Volume 1 Section 1 Part BD2/12 (Technical Approval of Highways Structures) of  Highways England’s Design Manual for Roads and Bridges; and  (d) any other details requested by the county planning authority prior to or within 14 days of  receiving a submission by the undertaker under paragraph (6).  54