10.—(1) Regulation 3 (meaning of “offshore installation”) is amended as follows.U.K.
(2) In paragraph (1)—
(a)after sub-paragraph (c) (but before the “or” immediately following it) insert—
“(ca)for undertaking activities that involve mechanically entering the pressure containment boundary of a well;”;
(b)in sub-paragraph (d) for “mainly” substitute “ primarily ”.
(3) For paragraph (2)(d) substitute—
“(d)a mobile structure which has ceased to be used for any of the purposes specified in paragraph (1), and has since been used for a purpose not so specified;
(da)a fixed structure which has ceased to be used for any of the purposes specified in paragraph (1), for so long as it is used for a purpose not so specified;”.