Judge Philippe Kirsch, President of the International Criminal Court (ICC) and UN Secretary-General Kofi Annan signed an agreement Monday governing the relationship between their institutions. The agreement provides for an exchange of representatives, gives the ICC observer status in the UN General Assembly, allows the use of the UN free pass as a valid travel document by some ICC officials, and defines the level of cooperation by the UN in ICC judicial prosecutions.
The ICC press release is here. The agreement is here: part 1; part 2. [PDF].