11.—(1) The authorised development must be implemented in accordance with the outline archaeological written scheme of investigation.
(2) No stage of the authorised development with the potential to affect buried archaeological assets must commence until a written scheme for the investigation of areas of archaeological interest relevant to that stage (if any) as identified in the outline archaeological written scheme of investigation has been submitted to and approved by the relevant planning authority following consultation with Historic England or Cadw as appropriate.
(3) The scheme approved under sub-paragraph (1) must be in accordance with the outline archaeological written scheme of investigation, and identify the measures to be taken to investigate, protect, record or preserve any significant archaeological remains that may be found.
(4) Any archaeological works carried out under the approved scheme must be carried out by an organisation registered with the Chartered Institute for Archaeologists or by a member of that Institute.
(5) Any archaeological works must be implemented in accordance with the approved scheme.