Yes you can check in to your accommodation any time after your contract start date. However, please note you will still be required to pay rent from the contract start date even if you have not yet checked in.
If you are checking into your accommodation late please email your accommodation with your desired check in date:
Queen Mary Building
Abercrombie Student Accommodation
Darlington Road Terraces and Darlington House
Nepean Hall, Nepean Lodge and Nepean Residence