Article 3  SCHEDULE 2  REQUIREMENTS  PART 1  REQUIREMENTS  Interpretation  1.  In this Schedule—  2.  The authorised development must commence no later than the expiration of 5 years beginning  with the date that this Order comes into force.  3. —(1) The authorised development must be designed in detail and carried out in accordance  with the preliminary scheme design shown on the works plans and engineering drawings and  sections unless otherwise agreed in writing by the Secretary of State following consultation with  the relevant planning authority on matters related to its functions, provided that the Secretary of  State is satisfied that any amendments to the works plans and engineering drawings and sections  showing departures from the preliminary scheme design would not give rise to any materially new  or materially different environmental effects in comparison with those reported in the  environmental statement.  (2) Where amended details are approved by the Secretary of State under sub-paragraph (1),  those details are deemed to be substituted for the corresponding works plans and engineering  drawings and sections and the undertaker must make those amended details available in electronic  form for inspection by members of the public.  ( a ) 1990 c. 43. Section 78A was inserted by section 57 of the Environment Act 1995 (c. 25) and amended by section 86(2) of  the Water Act 2003 (c. 37).  ( b ) S.I. 2017/1012.  ( c ) 1981 c. 69.  42 “contaminated land” has the same meaning as that given in section 78A( a ) of the  Environmental Protection Act 1990;  “European protected species” has the same meaning as in regulations 42 (European protected  species of animals) and 46 (European protected species of plants) of the Conservation of  Habitats and Species Regulations 2017( b );  “the Manual of Contract Documents for Highway Works” means the document of that name  published electronically by or on behalf of the strategic highway authority for England or any  equivalent replacement published for that document;  “nationally protected species” means any species protected under the Wildlife and  Countryside Act 1981( c ); and  “REAC” means the record of environmental actions and commitments at Volume 7 of the  environmental statement (Application Document TR010035/APP/7.3).  Time limits  Detailed design 