In 1997, the Cellular Phone Taskforce was the lead petitioner in a challenge to the Federal Communications Commission's RF radiation exposure limits, which was joined by dozens of other parties including the Ad Hoc Association of Parties Concerned About the Federal Communications Commission Radio Frequency Health and Safety Rules ("AHA"). The Court of Appeals for the Second Circuit ruled for the FCC. An appeal to the U.S. Supreme Court, which was supported by an amicus curiae brief written by Senators Patrick Leahy and Jim Jeffords, was denied.