What is next option if Bashir's government delay south Sudan referendum in Jan,09, 2011?

South Sudan is expect to hold referendum early next years as it was articulated in CPA signed at Nashivasha, Kenya. Now there are some rumor that Bahsir is not happy in seeing people from southern part of the country to take this opportunity to decide their fate whether to confirm the existing unity or to form their own newest state in the world. So the question here what will the position of international communities signatories to this deal in case of minutes delay?