# The Veterinary Medicines Regulations 2007, Paragraph 19: Sampling and analysis


(1) If any enforcement action is taken under this Schedule based on a sample, that sample must have been taken and analysed in accordance with Council Directive 76/371/EEC (establishing Community methods of sampling for the official control of feedingstuffs).
(2) Unless otherwise specified in the marketing authorisation, it is a defence if the active ingredient in the sample is within the following tolerances—
Tolerance table
Level of active ingredient specified on the label
Tolerance£
≤50 mg/kg
±50%
>50 mg/kg £ ≤500 mg/kg
±40%
>500 mg/kg ≤5g/kg
±30%
>5g/kg ≤50g/kg
±20%
>50g/kg
±10%

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Source: https://www.legislation.gov.uk/uksi/2007/2539/schedule/5/paragraph/19 (the official version)
Page: https://openlegislation.uk/veterinary-medicines-regulations-2007/schedule-5/paragraph-19
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.