# The Seed Potatoes Regulations (Northern Ireland) 2016, Paragraph 4


An official document used—
(a) in the case of pre-basic seed potatoes, shall be coloured white with a diagonal violet line;
(b) in the case of basic seed potatoes, shall be coloured white;
(c) in the case of test and trial seed potatoes, shall be coloured orange.

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Source: https://www.legislation.gov.uk/nisr/2016/190/schedule/2/paragraph/4 (the official version)
Page: https://openlegislation.uk/seed-potatoes-regulations-northern-ireland-2016/schedule-2/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.