Submitting the papers before the last dates would make you eligible for consideration of issue of EC/CC for the relevant examination provided you have qualified in the submitted papers.
If on evaluation it is found that you have not qualified in any of the papers then you would be needed to resubmit the papers. In such a case if you resubmit the papers it would amount to submitting beyond the cut off dates, therefore making you eligible for the subsequent examination only.
Submission and re-submission should also be within the cut off dates. Therefore it would be in a student’s own interest that he/she submit the papers at the earliest possible time not waiting till the cut off dates.