This document looks at the various pieces of legislation that could possibly be used to regulate alien and invasive species. The basic premise of this document is that existing legislation should be used as far as possible to address the matter for the time being by way of regulation, rather than to wait till legislation dealing specifically with the matter is passed, as this may take a very long time. The distinction between alien species and invasive species is something that we need to consider. The term alien invasive species seems to indicate that invasive species are always alien, which may not be the case. Similarly, alien species may not necessarily pose the same risk to ecosystems as invasive species. It may therefore be useful to consider talking of alien species and invasive species, and to deal with each group on its own merits, rather than to lump them together.