The process changed in December 2016. Prior to that, you did send Schedule A and police certs up front (as well as an up-front medical). This all changed from Dec 2016 onwards. Probably because the processing times were so long that the medicals and police certs were becoming out of date, purely due to how long it took CIC to process them - as for why Schedule A - who knows!
In any event, you will be asked for both Schedule A, police certs and medical(s) by CIC when they want them after submission. You will be wasting your time and money to send them in up-front as they will likely simply ask for new ones again (and you simply will not be able to do an up front medical even if you tried as the panel physician has no way to submit).