When the Supreme Court overruled Chevron deference on Friday, it may have also stripped the Biden administration’s only line of defense for overhauling Title IX, experts say.

The Title IX rewrite, which is set to take effect Aug. 1, redefined sex to include expansive claims of gender identity and, many critics say, foreclosed sex-specific facilities in schools such as restrooms and locker rooms. However, with the overturn of Chevron, the Biden administration may have lost the only way it could have defended the highly controversial rules governing the civil rights law.