U.S. Supreme Court Hears Arguments In ‘Landmark’ Yakama Nation Gas Tax Case — Whether a Northwest Native tribe can legally transport goods and services across state lines is at the heart of arguments that will be presented to the U.S. Supreme Court on Tuesday. In 1855, the Yakama Nation signed a treaty with the United States that expressly allows for free travel across state and tribal boundaries. This clause convinced the Yakama Nation that the owner of the Cougar Den gas station on the Yakama Reservation is legally allowed to transport gasoline from Oregon and sell it on the reservation without paying state taxes. In March, the Washington state Supreme Court agreed. But Washington state’s Department of Licensing still disagrees. — Emily Schwing for KUOW 97.9 — October 29, 2018