The California state Senate passed a measure on October 11 to prevent gas prices from spiking in a state where it is notoriously expensive to fill up at the pump.

The proposal, backed by Democratic Gov. Gavin Newsom, would give energy regulators the authority to require that refiners keep a certain amount of fuel on hand. The goal is to try to keep prices from increasing suddenly when refiners go offline for maintenance. Proponents say it would save Californians billions of dollars at the pump.

The bill was inspired by findings from the state’s Division of Petroleum Market Oversight, which demonstrated that gas price spikes are largely caused by increases in global crude oil prices and unplanned refinery outages.

State Sen. Nancy Skinner, a Democrat representing Berkeley, said the proposal is about saving money for consumers. “While global crude prices are not something we can control, a shortage of refined gasoline is something that we can prepare for,” she said.

It has received intense pushback from Republican lawmakers, labor groups, and the oil industry. Some opponents say it could unintentionally raise overall gas prices and threaten the safety of workers by giving the state more oversight over refinery maintenance schedules. They argued delaying necessary maintenance could lead to accidents.

The Western States Petroleum Association criticized Newsom and the Democratic lawmakers supporting the bill, saying it would not benefit consumers.

“If they were serious about affordability, they’d be working with our industry on real solutions,” Catherine Reheis-Boyd, the group’s president, said in a statement. “Instead, they’re forcing a system they don’t understand, and Californians will pay the price.”

Californians pay the highest rates at the pump due to taxes and environmental regulations. The average price for regular unleaded gas in the state is about $4.67 per gallon as of October 11, compared to the national average of $3.21, according to AAA.

Republican state Sen. Brian Dahle said there shouldn’t have been a special session to weigh the proposal, because the bill does not do anything urgent. The proposal fails to address the state taxes and regulations that contribute to higher gas prices, he said.

This article was provided by The Associated Press.