FWIW According to the law, you have to be advertising or operating the property as an unpermitted vacation rental.
So is Steyer actively renting the place out, or just letting Biden use it and they're paying him the 'fair market value' so it won't be seen as a gift?
“Civil Penalty of up to $20,000”
The keywords here are “up to“. $1 is up to $20,000.