Article 3  1.  The authorised development must not commence after the expiry of five years from the date  on which this Order comes into force.  2. —(1) No part of Work No. 1A(iv), Work No. 1B(iv), Work No. 1C, Work No. 1E, Work  No.2, Work No.3, Work No. 4, Work No. 5 and Work No. 6 may commence until details of the  layout, scale and external appearance for that Work No. have been submitted to and approved by  the relevant planning authority.  (2) No part of Work No. 1A and Work No. 3 may commence until a plan has been submitted to  and approved by the relevant planning authority demonstrating that within Work No. 1A and  Work No. 3 there is sufficient space to support a heat export system capable of providing at least  30 megawatts heat off–take for district heating.  (3) The details submitted for approval under sub–paragraph (2) must be submitted alongside the  details submitted for approval under sub–paragraph (1).  (4) The details submitted for approval under sub-paragraph (1) must be in accordance with the  design principles.  (5) The authorised development must be carried out in accordance with the approved details.  3. —(1) The elements of the authorised development listed in column (1) of the table below  (design parameters) must not exceed the maximum dimensions and levels and, where applicable,  the minimum dimensions, set out in relation to that element in columns (3) to (7) of that table.  32 (1)  Element of  authorised  development  (2)  Work No.  (3)  Maximum  length  (metres)  (4)  Maximum  width  (metres)  (5)  Maximum  height  (metres)  AOD  (6)  Minimum  height  (metres)  above  surrounding  ground level  (7)  Maximum  depth  (metres)  below  AOD  Main  Riverside  Energy Park  Building  1A  (excluding  Work  No.1A(iv),  1C and 1E  200  102  65  –  –  Solid fuel  storage  bunker  Part of  Work No.  1A(i)  –  –  –  –  8  Anaerobic  digestion  system  1B  (excluding  Work No.  1B(vi) and  Work No.  1B(vii)  87  68  43  –  –  Other  integral  1D, 2(b), 3,  4, 5, 6 and  111  116  38  –  –  Table 1  SCHEDULE 2  REQUIREMENTS  Time limits  Detailed design approval  Parameters of authorised development 