In this Order—

• “the 1974 Act” means the Health and Safety at Work etc. Act 1974;

• “activity” includes, unless the context otherwise requires, a diving project and standing a vessel by;

• “designated area” means any area designated by order under section 1(7) of the Continental Shelf Act 19644 and “within a designated area” includes over and under it;

• “diving project” has the same meaning as it has in the Diving at Work Regulations 19975 save that it includes an activity in which a person takes part as a diver wearing an atmospheric pressure suit and without breathing in air or other gas at a pressure greater than atmospheric pressure;

• “gas importation and storage zone” has the meaning given by section 1(5) of the Energy Act 20086 and “within a gas importation and storage zone” includes over and under it;

• “offshore installation” has the meaning given in article 4(2) and (3) of this Order;

• “the prescribed provisions of the 1974 Act” means sections 1 to 59 and 80 to 82 of the 1974 Act;

• “supplementary unit” means a fixed or floating structure, other than a vessel, for providing energy, information or substances to an offshore installation;

• “territorial sea” means the territorial sea adjacent to Great Britain and “within the territorial sea” includes on, over and under it; and

• “vessel” includes a hovercraft and any floating structure which is capable of being navigated.

For the purposes of this Order, any structures and devices on top of a well are treated as forming part of the well.