There are two things. One is that there are variable dates because they were purchased at different times. Normally the expiry is five years, but we're working with the manufacturer and researchers and others, because we think the actual shelf life will be much longer and that there are other strategies to deal with that. In addition, we're in ongoing conversations with the provinces and territories about how to renew that, when and if that is required into the future.
On May 15th, 2008. See this statement in context.