See: Heywood, V. H., & Sharrock, S. (2013). European Code 
of Conduct for Botanic Gardens on Invasive Alien Species. 
Council of Europe Publishing, F-67075 Strasbourg www.coe.
int/Biodiversity
25SUMMARY FOR POLICYMAKERS
19SUMMARY FOR POLICYMAKERS
BACKGROUND
Box SPM 1 Voluntary codes of conduct can complement legislation for managing the risks 
of transport and the introduction of invasive alien species through trade. 