You have to submit official scores by your application deadline - your self reported score on you PCQ is not sufficient. If your December score is higher, you can submit it after the deadline, but you must submit an official score before the deadline. It doesn't sound like you have, but if you took another exam after the PCQ that was higher than the reported score on your PCQ you could submit that official score instead of the PCQ score. You don't have to submit the official score you reported on your PCQ, but you have to submit AN official score by your deadline, and should obviously submit your highest score.