SPOKANE, Wash. (AP) — The Washington Supreme Court has ruled that a Spokane law granting a local property tax exemption to senior citizens and disabled veterans is unconstitutional.

The court said Thursday that the state Constitution requires that all taxes be uniform on the same class of property.

The city of Spokane in 2015 granted the local property tax exemption to senior citizens and disabled veterans. But the county assessor and treasurer refused to implement the ordinance.

The trial court ruled that the city's new ordinance was constitutional. The state Department of Revenue and Spokane County appealed, and the state Court of Appeals reversed the trial court ruling.

The Supreme Court agreed with the appeals court that the Spokane ordinance was unconstitutional.