# Council Regulation (EC) No 1099/2009 of 24 September 2009 on the protection of animals at the time of killing (Text with EEA relevance), Division 9.4: Gas produced by an engine specially adapted for the purpose of killing of animals may be used provided that the person responsible for killing has previously verified that the gas used:

Extent: E+W+S+N.I.

(a)has been suitably cooled;
(b)has been sufficiently filtered;
(c)is free from any irritant component or gas.
The engine shall be tested every year before the killing of animals takes place.

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Source: https://www.legislation.gov.uk/eur/2009/1099/annex/I/CHAPTER/II/division/9/division/9.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-1099/annex-I/CHAPTER/II/division-9/division-9.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.