If the EV charger includes an App designed to report this usage no extra meter would be needed. All that is needed then is an internet connection, or, connection through the power company network over their power lines if such is available for any particular customer.
Tesla already has Autobidder, and modifying this for use in the charger, the car, or elsewhere for reporting the results will further enhance Tesla's leadership role, cement their ability to provide easy low-cost government compliance, and make them a shoe-in for related programs. All of which would be favorable toward increasing the SP over time, while also insuring there is money being collected to cover wear and tear on the infrastructure by EVs.