Requiring the disclosure of fiscal sponsorships is key. On April 23, the US Treasury Department announced that the IRS plans to revise Form 990—the annual information return filed by tax-exempt organizations—to improve transparency and strengthen oversight, specifically targeting reporting on government contracts, government grants, and fiscal sponsorship arrangements. The stated goals are to detect misconduct and hold wrongdoers accountable. Treasury Secretary Scott Bessent put the matter bluntly: “We are ending the days of hiding fraud, abuse, and extremist activity behind complicated nonprofit arrangements. When bad actors misuse charitable structures, directors and officers should understand that transparency can lead to scrutiny,...