V skladu s postopkom iz člena 21 se lahko določi, da lahko države članice zahtevajo, da imajo v primerih, razen tistih, ki so predvideni v tej direktivi, pakiranja osnovnega semena, certificiranega semena ali trgovskega semena, nalepko dobavitelja (ki je lahko nalepka, ločena od uradne nalepke, ali pa so podatki o dobavitelju natisnjeni na samo pakiranje) ali da partije semena, ki so skladne s posebnimi pogoji o prisotnosti Avena fatua, določenimi v skladu s postopkom iz člena 21, spremlja uradno potrdilo o skladnosti z navedenimi pogoji.
In accordance with the procedure laid down in Article 21 it may be provided that Member States may require that, in cases other than those provided for in this Directive, packages of basic seed, certified seed or commercial seed shall bear a supplier's label (which may either be a label separate from the official label or take the form of suppliers' information printed on the package itself) or that seed lots complying with the special conditions concerning the presence of Avena fatua, laid down in accordance with the procedure provided for in Article 21, should be accompanied by an official certificate attesting compliance with those conditions.