Good point on needing to be re-authorized from time to time.
This happens to me almost everytime I just unplug my older DirecTV extra SAT RCVRS.
I taped the ACCOUNT INFO on each SAT RCVR that I was moving back an forth from the house to the RV TRAILER so that I would have all the info I would need to pass along to DIRECTV to get it authorized again.
I was calling the DIRECTV 800 number at first and then discovered you could do this ON-LINE  by logging into your account.
Having all the account info on-hand including where the SAT RCVR was being used in your house all the time was a blessing when you need it.
Roy Ken