The reality is that this will have an impact, not just as a deterrent but in terms of the lives that it will save, the families who would otherwise have been impacted—but also just the very clear message that this Parliament sends to people who wish to go on the roads after taking drugs, that that is not OK. It is not OK to do that, and we've seen the television messages and we've seen the ads on TV, but there are now legislative powers for the police to be able to stop you, to be able to test you, and to be able to potentially even prosecute you for that offence—and to be able to make sure that those tests are done in an accurate way and that there is a fair process around that. 