Section 13 Interpretation.

In this Act, except so far as the context otherwise requires—

• “the appropriate Minister” means, except as respects Scotland or Wales and Monmouthshire, F1the Secretary of State and, as respects Scotland or Wales and Monmouthshire, the Secretary of State;

• “fumes” means any airborne solid matter smaller than dust;

• “the Minister” means as respects England and Wales the Secretary of State and as respects Scotland the Secretary of State;

• “prescribed” means prescribed by regulations made by the Minister;

• “the principal Act” means the M1Clean Air Act 1956;

and other expressions used in this Act and the principal Act have the same meanings in this Act as they have in that Act.

In this Act any reference to the rate of emission of any substance or any reference which is to be understood as such a reference shall, in relation to any regulations or conditions, be construed as a reference to the quantities of that substance which may be emitted during a period specified in the regulations or conditions.

Any reference in this Act to any enactment is a reference thereto as amended, and includes a reference thereto as extended or applied, by or under any other enactment, including this Act.