# The Patents (Supplementary Protection Certificates) Rules 1997, Paragraph 3: Definitions


“active substances”: substances or micro-organisms including viruses, having general or specific action:
(a) against harmful organisms; or
(b) on plants, parts of plants or plant products;

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Source: https://www.legislation.gov.uk/uksi/1997/64/schedule/1/crossheading/1/paragraph/3 (the official version)
Page: https://openlegislation.uk/patents-supplementary-protection-certificates-rules-1997/schedule-1/crossheading-1/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.