The Alliance for Automotive Innovation is pressuring the Biden administration to reconsider its proposed emissions rules in fear that halting gas-powered vehicle production too soon could have negative repercussions, Reuters reports.

The proposed rules in question would require 67% of new vehicles to be electric by 2032, though finalized rules will not be released until early next year.

The Alliance–which represents General Motors, Toyota Motor, Volkswagen, Ford Motor, Stellantis, and other major automakers–sent a letter to three cabinet agencies and the White House about the rules. 

The document asserted that the proposed regulations would force automakers to abandon internal combustion vehicles too early, resulting in a loss of revenue, and consequently, the funds needed for an EV transition.

Alliance for Automotive Innovation CEO John Bozzella, who signed the letter, cited “overlapping, duplicative and sometimes conflicting objectives” within the proposed rules, and argued that it would ultimately hinder the White House’s goal of 50% EV sales by 2030.

Automakers have been voicing concern over the proposed regulations since they were first unveiled, such as a potential $14 billion in Corporate Average Fuel Economy (CAFE) fines that could occur as a result.

In addition to the letter, the Alliance held a meeting with EPA Administrator Michael Regan on Nov. 29, and last week, GM CEO Mary Barra met with White House Chief of Staff Jeff Zients and environmental adviser Ali Zaidi to discuss vehicle regulations and other issues.