Jay-Z and his attorneys at Quinn Emanuel Urquhart & Sullivan are accusing the American Arbitration Association of lacking a slate of African-American arbitrators capable of handling “large and complex cases,” contradicting the organization’s claims about its diversity.

On Wednesday, the rap artist and entrepreneur persuaded a New York State judge in Manhattan to pause an arbitration with the current owner of his Rocawear apparel brand, pointing to the lack of African-American arbitrators qualified to preside over the matter.