It's real simple: Towing companies place orange stickers on vehicles with expired inspection or registration stickers, wait until management call them, then tows them away. State Law prohibits the towing company from providing a parking facility any financial benefit, directly or indirectly.
In addition, State Law requires the parking facility to notify the registered owner of the vehicle "in person with a witness" a written warning that gives them 10 days to update the stickers or be towed; or;
by certified mail sent by the parking facility to the registered owner of the vehicle giving 10 days notice to update or be towed at their expense.
Signature thinks they can sidestep this requirement and TDLR caught them red handed.