I would have to say probably all of them with employees, because they use it for their payroll, as they need to make deductions at the source, by law, for taxes and the Canada Pension Plan and employment insurance. On that basis, they have to have that number. They're actually supposed to ask for it on hiring somebody, to make sure that person actually has a social insurance number. Those are the kinds of things we will have in our code, so that proper steps are taken by employers in the private sector in the use of the social insurance number.
On June 15th, 2006. See this statement in context.