Earlier quoted context omitted.
Why does that require anything other than enforcement of existing trademark law?
Creating and defending a trademark is very expensive. Many restaurants would prefer not to spend this money just to prevent unauthorized listings. They’d rather delegate the responsibility of preventing unauthorized listings to the state attorney who has more resources and expertise.
Enforcing it is free: you can send your own cease and desist for free. The only time you need a lawyer is if they refuse and you want to sue them. If the court rules in your favor, you can even sue them for the legal costs and costs of damages.