The undertaker must comply with any special direction given by the harbour master under section 3(1)(b) of the Great Yarmouth Outer Harbour Act 1986 M1 or section 16 of the Great Yarmouth Port Authority Act 1990 M2 that is strictly necessary to ensure the safety of navigation during construction of the works.

Except as is mentioned in sub-paragraph (1), neither the harbour master nor the GYPA may give any general or special direction which would prevent or materially hinder any works or activity authorised by or under any provision of this Order.