The electronic travel authorization is not a new phenomenon. Certainly the United States has already been operating with their electronic travel authorization, as has the Government of Australia, and I think a number of other jurisdictions.
It will require people who are coming by air to Canada from visa-exempt countries to apply for an electronic authorization before they travel here. At this point in time U.S. citizens will be exempt, so this will be a light touch. The intention is that it should be very quick and very easy, but it will actually allow us to screen most visitors before they board a plane, to verify whether or not they pose a risk. The intention as well is that it will be low cost, quick, and easy.