She calls this a "key condition for the success of the Copenhagen conference."

VOA: standard.2009.12.16

This is something that we have been doing so far." Minister Jeremic admits cooperation with The Hague tribunal is a key condition to realize the ambition of Serbia and other Balkan nations to join the European Union.

VOA: standard.2009.10.25

He said finding women at risk of the severe form of the condition was key.

BBC: Pre-eclampsia during pregnancy can be fatal

But Iran has again refused to meet a key condition that the Russians have set.

NPR: Iran Refuses Key Condition in Russia Nuclear Talks

The IAEA's approval of the plan is a key condition for enacting the deal.

BBC: India MPs hold vote of confidence