An Arizona tour operator has filed a lawsuit against new federal fees targeting international visitors at national parks.
The rule adds a $100 surcharge for nonresidents at 11 popular parks across the United States.
The company argues that only Congress holds the power to set park pricing and change fee structures.
Federal officials implemented the policy as a way to address maintenance backlogs and rising operational costs.
The surcharge applies at parks including Yellowstone, Yosemite, and the Grand Canyon.
International tourism groups warn the fee could discourage overseas travelers from visiting American landmarks.
The lawsuit seeks an immediate injunction to block enforcement while the case moves through court.
Legal experts say the dispute hinges on whether agencies can impose fees without explicit legislative approval.
A ruling could set a precedent for how national parks set prices for foreign visitors in the future.
