A peer review process is required, so you need to have your paper ready for that review.
This review involves swapping papers with another group who will then essentially grade your paper using
the final grading structure. While the review-grade will not count in your final grade, you will be
able to use it for final-tuning before your hand in your paper (and before oral presentation). You
will have about a week to polish up your stuff before "show time"!