2.—(1) In this Order, unless the context otherwise requires –
“the 1974 Act” means the Health and Safety at Work etc. Act 1974;
“designated area” means any area designated by order under section 1(7) of the Continental Shelf Act 1964(1) and “within a designated area” includes over and under it;
“the prescribed provisions of the 1974 Act” means sections 1 to 59 and 80 to 82 of the 1974 Act;
“territorial waters” means United Kingdom territorial waters adjacent to Great Britain and “within territorial waters” includes on, over and under them;
“vessel” includes a hovercraft and any floating structure which is capable of being manned.
(2) For the purposes of this Order, a person shall be deemed to be engaged in diving operations throughout any period from the time when he commences to prepare for diving until the time when –
(a)he is no longer subjected to raised pressure;
(b)he has normal inert gas partial pressure in his tissues; and
(c)if he entered the water, he has left it;
and diving operations include the activity of any person in connection with the health and safety of a person who is, or is deemed to be, engaged in diving operations.
1964 c. 29; section 1 was amended by the Oil and Gas (Enterprise) Act 1982 (c. 23), Schedule 3, paragraph 1.