# The Milk (Special Designation) Regulations 1988, Paragraph 2


Any sample–
(a) of raw milk, milk heat treated for the purposes of transportation or pasteurised milk, or
(b) of sterilised milk or milk treated by the ultra high temperature method where the sample is taken from an open container,
on which the test is not begun within 24 hours of taking such sample, shall be discarded.

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Source: https://www.legislation.gov.uk/uksi/1988/2204/schedule/5/part/IV/paragraph/2 (the official version)
Page: https://openlegislation.uk/milk-special-designation-regulations-1988/schedule-5/part-IV/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.