There is nothing in the Excise Act of 2001 that gives the Canada Revenue Agency the right to deal with those products in any way. In all honesty too, some of these products are multipurpose, and determining what filter tool may be used and whether it's air filters, car filters, or cigarette filters would be difficult. We don't have responsibility for that at this time.
On May 7th, 2008. See this statement in context.