President Donald Trump can proceed with his plan to reduce the Department of Education’s workforce after a favorable Supreme Court ruling this week, but abolishing the department outright would still need congressional approval.

In a 6-3 order issued on Monday, the Supreme Court authorized the Education Department’s layoffs of nearly 1,400 employees from earlier this year after lower courts halted the major staffing reduction. The decision enables Trump to move forward with his executive order directing Secretary of Education Linda McMahon to dismantle the department.