In summary, while the interim institutions were in place, as is the case now, Kosovo would be a part of the FRY, albeit one with "substantial autonomy".
Those interim institutions and Serbia's limited jurisdiction would only be in effect until the final status was determined.
And everybody, save for a sizeable portion of the Serbian electorate, has recognized that the final status will be in the form of independence.
Hence Serbia's politicians being unable to act pragmatically in regards to Kosovo, and the Contact Group getting in their faces about it.
So, it's been decided by everybody by the Serbs? In what treaty did they decide this matter? Or, it's just opinion of some people/ countries?