Loams, I qoute from the preambular para of Chapter 5 in NEMBA:
[align=left]CHAPTER 5[/align]
[align=left]SPECIES AND ORGANISMS POSING POTENTIAL THREATS TO[/align]
[align=left]BIODIVERSITY[/align]
[align=left]Purposes of Chapter[/align]
[align=left]64. (1) The purpose of this Chapter is—[/align]
[align=left](a) to prevent the unauthorized introduction and spread of alien species and invasive species to ecosystems and habitats where they do not naturally occur;[/align]
[align=left](b) to manage and control alien species and invasive species to prevent or minimize harm to the environment and to biodiversity in particular;[/align]
[align=left](c) to eradicate alien species and invasive species from ecosystems and habitats where they may harm such ecosystems or habitats....[/align]
[align=left]In short, to prevent the spread of such species where it is inadvisable to do so, and to eradicate where harm is caused. There is, and never was, any intention to eradicate all, not even in so-called "public" waters. The act has ample escape clauses that would make it possible to exclude or exempt "private" waters in the regulations, and the intention was to do so for waters that were not in communication with any natural river systems. Sadly, however, it seems this is not pursued any further.[/align]