Been removed as the deadline has passed. If you've already signed up to it earlier on when you renewed there shouldn't be any issues.
Website states the following when you go into 'amend CCCS'.
"The deadline to join the ‘ALL AWAY GAMES’ scheme has now passed. If you need to update your card details for this scheme, you will need to write to us at Rangers Ticket Centre, 150 Edmiston Drive, Glasgow, G51 2XD (making sure to include your Rangers Number(s)), or visit the Ticket Centre in person."