From the BBC

Australia is to ban North Korean ships from entering its ports in response to its claimed nuclear bomb test, the foreign minister has announced.

Alexander Downer told Parliament the move would help Australia make a “quite clear contribution” to other sanctions agreed by the UN on Saturday.

I am not sure why Australia has been so lenient thusfar.

Australia is one of the few countries to have diplomatic relations with North Korea, but its trade ties are limited. In 2005, imports amounted to A$16m ($12m).