Paragraph 6

The Executive shall, before commencing the construction of the specified works, supply to Railtrack proper and sufficient plans thereof for the approval of the engineer and shall not commence the specified works until plans thereof have been approved in writing by the engineer or settled by arbitration.

Approval of plans supplied under this paragraph shall not be unreasonably withheld and, if within 56 days after such plans have been supplied to Railtrack the engineer shall not have notified his disapproval thereof and the grounds of his disapproval, he shall be deemed to have approved the plans as supplied.