The part where he drove it for the maximum legal time he was not required to affix his license plates to the car (six months), and then leased a new one [1].
[1] https://www.itwire.com/it-people-news/enterprise/50649-the-t...
[1] https://www.itwire.com/it-people-news/enterprise/50649-the-t...
It looks like as of this year (in California at least) there is now a requirement to have a temporary plate that is in the same location as the permanent one, partly to prevent people doing the above:
Do you? Why couldn't you be required to get the plates first and attach them to any car plateless you wish to drive?