# Clean Air Act 1993, Paragraph 4

Extent: E+W+S

While, by virtue of an order under paragraph 3 above, paragraph 2 is excluded from applying to any work or to any specified part of any work—
(a) in any proceedings brought under section 1, 2 or 20 in respect of the emission of smoke from the work or (as the case may be) from the specified part of the work it shall be a defence to prove that the best practicable means had been employed to prevent or minimise the alleged emission;
(b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

---
Source: https://www.legislation.gov.uk/ukpga/1993/11/schedule/3/paragraph/4 (the official version)
Page: https://openlegislation.uk/clean-air-act-1993/schedule-3/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.