There are at least a dozen current exemptions. The various things that generate an exemption are if it is long-term corporate debt--debt of more than a five-year term--or if it is paid by governments, sometimes two governments. There are those types of situations. Bank deposit interest sometimes qualifies for an exemption. As I say, there are about a dozen different headings under which exemptions already apply.
On December 6th, 2007. See this statement in context.