I would like to add this, Mr. Vincent. That data has been around since 1997, but for a long time the government thought that legislation, in its current form, could resolve the problem. The Copyright Act covers an area where digital works are constantly used. It was long thought that the act could enable holders to enforce their rights. I believe that is the case with virtually all pieces of legislation dealing with intellectual property.
On April 25th, 2007. See this statement in context.