Paragraph 5 I1

The undertaker shall, before commencing the construction of the specified works, furnish to LUL such proper and sufficient plans of the specified works (including particulars as to the working methods and the regulation of traffic in the vicinity of the specified works) as may reasonably be required by the engineer and shall not commence the specified works until those plans have been approved in writing by the engineer or settled by arbitration as provided in paragraph 6 below.