The head of the U.S. Environmental Protection Agency (EPA) said today (April 12) the agency would revise its proposed freeze of vehicle fuel economy standards before unveiling its final regulation in the coming months.

Reuters reported that in August, the EPA and National Highway Traffic Safety Administration (NHTSA) proposed freezing requirements for new cars and trucks at 2020 levels through 2026 but EPA Administrator Andrew Wheeler said in an interview at the agency’s headquarters “our final regulation is not going to be the same as our proposal.”

“We’ve taken constructive comments, criticisms, concerns from a whole host of different interest groups,” Wheeler said. “I hope our final regulation is something that everybody can get behind and support.”

Two U.S. officials briefed on the matter said they expected the EPA to wind up requiring a small increase in the yearly fuel efficiency gains, likely around mid-June, but said the precise figure had not been finalized. It is also not clear what flexibilities will remain in the final rule.

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