Senate Republicans cannot force the U.S. Postal Service to scrap thousands of electric vehicles and charging equipment in a massive tax and budget bill, the Senate parliamentarian said late on Sunday.

The U.S. Postal Service currently has 7,200 electric vehicles, made up of Ford e-Transit vehicles and specially built Next Generation Delivery Vehicles built by Oshkosh Defense.

USPS warned on June 13 that scrapping the electric vehicles would cost it $1.5 billion, including $1 billion to replace its current fleet of EVs and $500 million in EV infrastructure rendered useless and “seriously cripple our ability to replace an aging and obsolete delivery fleet.”