The problem is, as soon as it's a law, there will be some official way to calculate it, penalties for misreporting, perhaps even a professional who must audit the energy use. Etc. Getting that number gets expensive!
Whereas if it is a company voluntarily reporting it, the number would just be number of GPUs * wattage of GPUs / tokens generated past year = energy per token.
Whereas if it is a company voluntarily reporting it, the number would just be number of GPUs * wattage of GPUs / tokens generated past year = energy per token.