# The Environmental Protection (Prescribed Processes and Substances) Regulations 1991, 

Extent: E+W+S

Any process for the surface treatment of metal which is likely to result in the release into the air of any acid-forming oxide of nitrogen and which does not fall within a description in Section 2.1 or 2.2 of this Schedule and is not treated as so falling by virtue of the rules in Schedule 2.

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Source: https://www.legislation.gov.uk/uksi/1991/472/schedule/1/part/4/crossheading/section-43-acid-processes-nil (the official version)
Page: https://openlegislation.uk/environmental-protection-prescribed-processes-and-substances-regulations-1991/schedule-1/part-4/crossheading-section-43-acid-processes-nil
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.