If the works are not completed within ten years from the coming into force of this Order or within such extended period as the Ministers may on the application of the Board allow by consent in writing, the powers granted to the Board under this Order for making and maintaining the works shall cease to have effect, unless the works have been substantially commenced.

As soon as reasonably practicable after any consent is given under paragraph (1), the Board shall arrange for a notice to be published in the Edinburgh Gazette and in a local newspaper circulating in the area where the harbour is situated and the notice shall 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 Board shall 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.

The works shall be deemed to have been substantially commenced for the purposes of paragraph (1) where so much of Work No. 4 has been constructed as will enable other works to be constructed, maintained and managed together with that part of Work No. 4 as a harbour for the efficient and economic transport of goods or passengers by sea.

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