States along the East Coast loudly rejected President Donald Trump s decision to withdraw from the Paris climate accord and forged a bipartisan alliance that vowed to uphold the international pact to cut planet-warming emissions and take aggressive action on climate change.

While the formation of the U.S. Climate Alliance made a powerful statement, its another, rarely discussed regional league that offers the first real chance to make good on those promises.

Eight years ago, the Regional Greenhouse Gas Initiative made up of Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New York, Rhode Island and Vermont established an interstate cap-and-trade system that puts a limit on carbon dioxide emissions from the utility sector and allows power companies to buy and sell permits to pollute. The program has proven to be a notable success, reducing average utility bills by 3.4 percent , driving $2.7 billion in economic growth and creating at least 14,200 new jobs through energy conservation projects funded by the revenue it generates.

Its popular, too: Nearly 8 in 10 voters in RGGI states support strengthening carbon pollution limits.

Last year, RGGI pronounced reggie by those in the know embarked on a full review to determine whether to adopt a lower cap and stricter standards. The results of that review could come in the next few weeks. Sources familiar with the negotiations told HuffPost that it was imminent and said the talks had accelerated following Trumps drastic rollback of climate policies.

The decision for nine Northeastern states would come soon after this weeks vote by California lawmakers to renew the Golden States own cap-and-trade law .

The RGGI states are still working to evaluate design elements for the program, and to move forward with a consensus that meets the needs of every RGGI state, Katie Dykes, the chair of RGGI, told HuffPost by email. The RGGI states have not set a deadline for the conclusion of program review, but will communicate with stakeholders and provide updates as they are available regarding future meetings and materials.

The group is weighing three different policies that environmental groups characterize as the unacceptable, better and best case of the scenarios on the table. Right now, RGGI reduces the amount of carbon that utilities are allowed to spew by 2.5 percent each year, based on the previous years emissions. That means the amount of additional emissions reductions gets smaller and smaller every year. Each of the policies under consideration would set the annual reduction rate as a percentage of a fixed baseline.