If all the works are not completed within 10 years from the coming into force of this Order or such extended time as the Ministers may, on the application of the Company, allow by consent in writing, the powers by this Order granted to the Company for constructing and maintaining the works will cease to have effect except as to so much of them as is then substantially commenced.

As soon as reasonably practicable after any consent is given under paragraph (1), the Company must arrange for a notice to be published in the Edinburgh Gazette and in a local newspaper circulating in the area where the port is situated and the notice must contain a summary of the effect of that consent.

During the period of one month beginning with the date on which any notice is published in a local newspaper under paragraph (2), the Company must keep a copy of the consent referred to in that notice open to public inspection at their principal office at all reasonable hours, without payment.

Paragraph (1) does not apply to any works carried out under article 3(2) or article 5 (subsidiary works).

The works shall be deemed to have been substantially commenced for the purposes of paragraph (1) where so much of Work No. 1 has been carried out as is necessary to enable other works to be constructed, maintained and managed as a port for the efficient and economic transport of goods or passengers by sea.