http://www.legislation.gov.uk/eudn/2004/842/article/8Commission Decision of 1 December 2004 concerning implementing rules whereby Member States may authorise the placing on the market of seed belonging to varieties for which an application for entry in the national catalogue of varieties of agricultural plant species or vegetable species has been submitted (notified under document number C(2004) 4493) (Text with EEA relevance) (2004/842/EC)Commission Decision of 1 December 2004 concerning implementing rules whereby Member States may authorise the placing on the market of seed belonging to varieties for which an application for entry in the national catalogue of varieties of agricultural plant species or vegetable species has been submitted (notified under document number C(2004) 4493) (Text with EEA relevance) (2004/842/EC)2020-12-12King's Printer of Acts of Parliamenthttps://webarchive.nationalarchives.gov.uk/eu-exit/https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02004D0842-20170401texttext/xmlen2017-04-01CHAPTER IIAgricultural plant species

Article 8Packages and sealing

Seed may be marketed only in closed packages or containers bearing a sealing device. Seed packages and containers shall be sealed officially or under official supervision in such a manner that they cannot be opened without damaging the sealing system or leaving evidence of tampering on either the official label provided for in Article 9 or on the package. In order to ensure sealing, the sealing system shall comprise at least either the official label or the affixing of an official seal.

In the case of seed potatoes, the packages shall be new and the container shall be clean.