Two groups are suing the Trump administration for allegedly illegally blocking an Obama-era regulation aimed at closing the wage gap.

In their lawsuit, the National Women’s Law Center and Labor Council for Latin American Advancement accuse the administration of canceling the rule without explanation or opportunity for public comment, according to the National Law Journal.

In August, the Trump administration blocked the rule, which required businesses to track worker pay by gender, race and ethnicity, calling it “enormously burdensome.”

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Ivanka Trump, first daughter and adviser to the president who has advocated equal pay for women, said at the time that the regulation “would not yield the intended results.”

The lawsuit, filed Wednesday, alleges that blocking the rule will temper efforts to close the gender and racial pay gaps.

“A dearth of comparative salary and wage information may contribute to the persistence of race and gender pay gaps, and limit attempts to remedy them,” according to the lawsuit. “As a result, employees face significant obstacles in gathering the information that would indicate they have experienced pay discrimination, which undermines their ability to challenge such discrimination.”