(1)The following enactments are referred to in this section as the " listed enactments "—
(a)the [1970 c. 55.] Family Income Supplements Act 1970 ;
(b)the principal Act;
(c)the [1975 c. 16.] Industrial Injuries and Diseases (Old Cases) Act 1975;
(d)the [1975 c. 61.] Child Benefit Act 1975 ;
(e)the [1976 c. 71.] Supplementary Benefits Act 1976 ;
(f)the [1979 c. 48.] Pensioners' Payments and Social Security Act 1979.
(2)The listed enactments shall have effect, and be deemed always to have had effect, as if—
(a)any reference to Great Britain included a reference to the territorial waters of the United Kingdom adjacent to Great Britain;
(b)in any reference to the presence or residence of a person in the United Kingdom (however expressed) the reference to the United Kingdom included a reference to the territorial waters of the United Kingdom ; and
(c)in any reference to a person residing or being in Northern Ireland (however expressed) the reference to Northern Ireland included a reference to the territorial waters of the United Kingdom adjacent to Northern Ireland.
(3)Where any of the listed enactments is derived from an earlier enactment (whether directly or indirectly) anything done under or by virtue of a provision of, or made under, that earlier enactment which contained a reference of a kind mentioned in paragraph (a), (b) or (c) of subsection (2) above shall have effect as if that reference had at the material time been the extended reference provided for by that paragraph.
(4)The Secretary of State may by regulations make such provision in respect of any enactment (including a listed enactment) as he considers necessary or expedient in connection with the operation of that enactment in relation to the territorial waters of the United Kingdom.