A federal appeals court on Tuesday blocked former President Joe Biden’s Saving on a Valuable Education plan, ruling that his administration lacked the authority to implement key provisions of the student loan repayment program.

The Eighth Circuit Court of Appeals ruled in favor of Missouri and six other Republican-led states that sued to halt SAVE, arguing that the Department of Education overstepped its legal authority to enact the expensive plan, which would cost upward of $500 billion over a 10-year period.