I don't know about everywhere else, but in Colorado we are implementing "intensity" (emissions/production) regulation.
The intensity limits that are used currently are based on estimated emissions and reported production projected into the next decade. It's a very crude system based on flakey data, but we're working on getting better data for the next time we decide on an allowed intensity level.
There are soooo many problems with this setup, I could go on for days about it, but in lieu of enough political will and funding to start shutting down oil and gas companies, we're going to do everything we can to reduce the emissions from the oil and gas sector.
I hope enough people get mad and organize to make that happen.