4(1)Subsection (1) of section 22 of the Clean Air Act 1956 (Crown premises) shall have effect, in relation to emissions from designated premises, as if—
(a)references to premises under the control of a government department which are occupied for the public service of the Crown included a reference to designated premises; and
(b)references to the responsible Minister were references to the Secretary of State.
(2)For all other purposes of that Act any such premises shall be treated as Crown premises occupied by a government department.