I'll make a couple of observations. First of all, both the REACH program and the obligation in CEPA to categorize and then assess categorized substances were designed to address the same issue. The issue is that, since the 1990s, most developed jurisdictions in the world have had a fairly similar new substances program. Starting 25 years ago, all countries said, if it's new, you can't use it until you show that it's safe, essentially. However, everybody started in 1990 with a legacy of thousands of substances that were in commerce, some of which had been assessed primarily for health or safety reasons—food, drugs, and so on—virtually none of which had been assessed fully, for a full set of health and environmental risks.
The challenge for everybody was where to start. In Canada, we knew that our list was at least 23,000 substances. In the U.S., I've seen estimates of a typical factor of 10 times. Canada was actually the first country in the world to establish an approach, to codify an approach. I'm not making a comment as to whether it's the best approach or not, but we were the first. We took a hazard approach and categorized the substances strictly based on certain hazard characteristics. Are they persistent? Are they biocumulative? Are they inherently toxic? Another factor looks at potential for exposure. If they met those hazard characteristics, then we'd have an obligation to assess them. It is a risk-based assessment. We moved from 23,000 substances to 4,300; and we've committed to finishing the 4,300 by 2020.
Mr. Morin has described the kinds of assessments we do. To manage, in some cases we actually get into an approach that is very much like REACH. REACH is an acronym for the registration, evaluation, authorization, and restriction of chemicals. Under REACH, first, there is a broad set of obligations to register. That took 10 or more years to put in place. Then government officials have an obligation to evaluate. If they evaluate and certain substances meet certain hazard criteria, they go on different authorization tracks. If they meet certain hazard criteria, the authorization test is much harder. It doesn't mean it's prohibited, but the test becomes, basically, that you can't use it unless you can show that there is no good alternative.
We have a similar approach. We assess, and then we have the prohibited substances regulation. If substances meet criteria that basically suggest they shouldn't be used in Canada, we put them on that regulation. What that regulation then says is, essentially, we know you've been using these substances and this could cause a lot of trouble, so you can apply for a permit to continue to use the substance for three years but only if you can show us that there's no technical or economically feasible alternative. If there's an alternative, you have to stop now. If there isn't and you can prove that to us, you can get a permit to continue to use it for three years, and we apply that to those substances that we add to the prohibition regulations. There are differences, but there are also broad similarities in the overall approach to management.
The one final point I'd make is that our regime was implemented at least a decade before REACH came fully into place, and we're much farther down the track of working our way through that full legacy of thousands of existing substances that had not been assessed.