2.—(1) This paragraph shall apply to and in relation to –
(a)any offshore installation and any activity on it;
(b)any activity in connection with an offshore installation, or any activity which is immediately preparatory thereto, whether carried on from the installation itself, in or from a vessel or in any other manner, other than –
(i)transporting, towing or navigating the installation; and
(ii)any activity in or from a vessel being used as a stand-by vessel;
(c)a diving operation involving –
(i)the survey and preparation of the sea bed for an offshore installation;
(ii)the survey and restoration of the sea bed consequent on the removal of an offshore installation.
(2) Subject to sub-paragraph (3), in this Schedule, “offshore installation” means a structure which is, or is to be, or has been, used while standing or stationed in water, or on the foreshore or other land intermittently covered with water –
(a)for the exploitation, or exploration with a view to exploitation, of mineral resources by means of a well;
(b)for the storage of gas in or under the shore or bed of any water or the recovery of gas so stored;
(c)for the conveyance of things by means of a pipe; or
(d)mainly for the provision of accommodation for persons who work on or from a structure falling within any of the provisions of this sub-paragraph,
together with any supplementary unit which is ordinarily connected to it, and all the connections.
(3) Any reference in sub-paragraph (2) to a structure or unit does not include –
(a)a structure which is connected with dry land by a permanent structure providing access at all times and for all purposes;
(b)a well;
(c)a structure which has ceased to be used for any of the purposes specified in sub-paragraph (2) and has since been used for a purpose not so specified;
(d)a mobile structure which has been taken out of use and is not yet being moved with a view to its being used for any of the purposes specified in sub-paragraph (2); and
(e)any part of a pipeline.