4.—(1) Section 4 (supplementary powers) is amended as follows.
(2) In subsection (1)—
(a)for “Secretary of State” substitute “Minister”, and
(b)for “his powers under section 1, 2 or 3” substitute “the applicable powers”.
(3) After subsection (1) insert—
“(1A) In subsection (1) “the applicable powers” means—
(a)where the Minister is the Secretary of State, the powers under section 1, 2 or 3, and
(b)where the Minister is the Treasury, the power under section 1.”
(4) In subsection (2)—
(a)in the words before paragraph (a), for “Secretary of State” substitute “Minister”, and
(b)in the words after paragraph (c), for “he” substitute “the Minister”.
(5) For subsection (4) substitute—
“(4) For the purposes of subsection (2) “relevant purpose” means—
(a)where the Minister is the Secretary of State—
(i)a purpose mentioned in section 1(2)(a) or (b) or 3, or
(ii)a purpose that broadly corresponds to that purpose, and
(b)where the Minister is the Treasury—
(i)a purpose mentioned in section 1(2)(a) or (b), or
(ii)a purpose that broadly corresponds to that purpose.”