The primary one is the one that we had in the 1989 legislation. This is that certain countries are listed as safe for refugees; they are a safe country of origin. If you're coming from a country, as I said, that's democratic, that follows the rule of law, that's a signatory to the UN convention, then you're not eligible to make a claim. You may be screened by a refugee officer at the port of entry who will ask you questions, but generally speaking you don't get access to the refugee systems.
Other countries in Europe and elsewhere have what they call “manifestly unfounded claims”. That is if someone has a claim that's obviously frivolous, the refugee officer questions him and believes that it's unfounded and there's no real substance to the claim, the claim can be stopped at that point and not allowed into the system. There are various ways of doing it.